Divisor function: Revision history

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curprev 15:1015:10, 30 April 2025 Citation bot talk contribs 27,525 bytes +10 Added issue. | Use this bot. Report bugs. | Suggested by Dominic3203 | Linked from User:Mathbot/Most_linked_math_articles | #UCB_webform_linked 640/1913 undo

curprev 05:0405:04, 24 March 2025 Jlktutu talk contribs 27,515 bytes −53 Undid revision 1282079056 by 2409:4080:9DCA:DE43:DD12:F8E3:53D7:B0A9 (talk) undo Tag: Undo
curprev 05:0305:03, 24 March 2025 2409:4080:9dca:de43:dd12:f8e3:53d7:b0a9 talk 27,568 bytes +53 kjdjsdvhsdhvsdhvoisdhvlkshvoshvoidvod undo Tags: Reverted Visual edit

curprev 03:4103:41, 17 March 2025 ResLookerUpper talk contribs 27,515 bytes +106 add an equivalent series using the polylogarithm undo

curprev 02:2302:23, 15 December 2024 Wqwt talk contribs m 27,409 bytes +14 No edit summary undo Tag: Visual edit
curprev 02:2302:23, 15 December 2024 Wqwt talk contribs 27,395 bytes +254 →Properties: dirichlet convolution undo Tag: Visual edit

curprev 21:5221:52, 26 November 2024 Mathgenious69 talk contribs m 27,141 bytes +6 changed "factorization" to "prime factorization" in the table of values undo Tag: Visual edit

curprev 00:2000:20, 18 October 2024 2601:447:cd80:e200:4465:2899:bdc9:2670 talk 27,135 bytes +69 No edit summary undo

curprev 08:2208:22, 8 January 2024 Mkapkic talk contribs m 27,066 bytes +22 That property only work on sigma sub 1 undo Tag: Visual edit: Switched

curprev 04:0804:08, 8 October 2023 Bubba73 talk contribs m 27,044 bytes +2 →Growth rate undo
curprev 00:3400:34, 8 October 2023 Bubba73 talk contribs m 27,042 bytes +8 →Table of values undo

curprev 22:5122:51, 10 August 2023 105.157.178.102 talk 27,034 bytes −4 The "Guy Robin" math page is not actually a wiki page for the mathematician Guy Robin, but the page of an English DJ Guy Robin undo Tag: Visual edit

curprev 22:2622:26, 2 August 2023 181.60.110.129 talk 27,038 bytes +12 I changed d(n) by \sigma_0(n) undo

curprev 03:5603:56, 12 June 2023 GalacticShoe talk contribs 27,026 bytes 0 →Other properties and identities: Capitalization undo

curprev 14:1614:16, 21 January 2023 Citation bot talk contribs 27,026 bytes +55 Add: issue, url. | Use this bot. Report bugs. | Suggested by Corvus florensis | #UCB_webform 969/1746 undo
curprev 12:5812:58, 21 January 2023 JDAWiseman talk contribs 26,971 bytes +32 →Growth rate undo

curprev 09:0809:08, 22 December 2022 192.38.129.8 talk 26,939 bytes +471 →Example: example with sigma_{-1} undo

curprev 19:0219:02, 15 December 2022 132.62.172.114 talk 26,468 bytes +1 →Other properties and identities: +, undo

curprev 17:3717:37, 30 October 2022 2a00:1028:8b43:3f76:450e:d8d1:d414:424b talk 26,467 bytes +64 →Series relations: Clarification undo

curprev 15:1615:16, 9 October 2022 David Eppstein talk contribs 26,403 bytes +747 →Formulas at prime powers: Fermi–Dirac primes undo
curprev 06:1406:14, 9 October 2022 Spacetime02 talk contribs 25,656 bytes 0 The article previously said the sum of divisors of the nth primorial was 2^n, which is untrue (p1# = 2, which has divisor sum 3). This edit corrects that to the number of divisors of the nth primorial. undo

curprev 11:1511:15, 28 September 2022 190.122.186.199 talk 25,656 bytes 0 →Growth rate undo Tag: Visual edit
curprev 09:5509:55, 28 September 2022 190.122.186.199 talk 25,656 bytes 0 →Formulas at prime powers undo Tag: Visual edit

curprev 11:4711:47, 4 April 2022 MFH talk contribs 25,656 bytes 0 →Definition: it is weird to use x as subscript / exponent. Any serious number theorist would use rather k. Now I get that author wants to hint that it's not required to be integer... Maybe we can use z? undo

curprev 14:4414:44, 21 March 2022 RedstoneDave talk contribs 25,656 bytes +49 →Formulas at prime powers: a sketch of proof undo

curprev 02:0102:01, 10 March 2022 71.231.185.165 talk 25,607 bytes −3 →Other properties and identities: Fixed typo, sigma is zero only for negative numbers undo Tags: Mobile edit Mobile web edit
curprev 01:5601:56, 10 March 2022 71.231.185.165 talk 25,610 bytes 0 →Other properties and identities: Fixed typo, only sum natural i undo Tags: Mobile edit Mobile web edit

curprev 03:1903:19, 26 February 2022 Goudron talk contribs 25,610 bytes +134 →Other properties and identities: p < q ⇒ p ≠ q, verbal clarification is superfluous; 2^k is not an "example" but a defining predicate with a free variable {{mvar|k}}; clarify the pairwise use of *generalized* pentagonal numbers in Euler's recurrence; fix a dead URL to Euler archive; minor copy-ed; canonicalize mark up only unmarked math in text only, the minimum for immediate readability, per WP:MATH. undo
curprev 01:4901:49, 26 February 2022 David Eppstein talk contribs 25,476 bytes +286 supply requested citation undo
curprev 01:4101:41, 26 February 2022 Bubba73 talk contribs 25,190 bytes +11 Undid revision 1074032972 by Goudron (talk) it is twice a square, not square of a square undo Tag: Undo
curprev 01:3301:33, 26 February 2022 Goudron talk contribs 25,179 bytes −11 →Other properties and identities: Every square of a square is also a square, so ((square || square-of-a-square) <=> square), the "or" term does not expand the domain of the constraint. Looking for a missing citation...- undo Tag: Reverted

curprev 01:5301:53, 25 December 2021 Japm48 talk contribs 25,190 bytes +300 →Formulas at prime powers: Explain further an imporant result undo

curprev 17:5817:58, 22 December 2021 Anita5192 talk contribs 24,890 bytes +2 Undid revision 1061596628 by Wevrem (talk) This was correct before. The divisor function is only defined for integers. undo Tag: Undo
curprev 17:4017:40, 22 December 2021 Wevrem talk contribs 24,888 bytes −2 fixed error in the "where" conditions of Euler's recurrence: sigma(x)=0 if x<0, _not_ if x<=0 as was originally stated. undo Tags: Reverted Visual edit: Switched

curprev 15:4715:47, 26 November 2021 216.24.45.23 talk 24,890 bytes −7 →Other properties and identities: simplify undo

curprev 06:2906:29, 14 September 2021 Cedar101 talk contribs m 24,897 bytes +15 →Table of values: text-align:right; {{sigma}} undo

curprev 09:4509:45, 24 August 2021 2a00:23c4:4e9f:d101:6087:25ef:480e:1976 talk 24,882 bytes +3 →Series relations undo

curprev 13:5813:58, 20 August 2021 164.52.242.130 talk 24,879 bytes −37 stale tag, most specific formulas have inline footnotes, and general references do suffice for most of this undo
curprev 13:4413:44, 20 August 2021 164.52.242.130 talk 24,916 bytes +114 →Series relations: due to Ramanujan, add link to Rankin–Selberg method undo

curprev 09:3209:32, 17 August 2021 2a00:23c4:4e9f:d101:39e6:989:c70e:8a59 talk 24,802 bytes 0 →See also undo

curprev 18:2718:27, 30 May 2021 Of the universe talk contribs m 24,802 bytes +45 →Formulas at prime powers: math formatting undo Tag: Visual edit: Switched
curprev 18:1818:18, 30 May 2021 Of the universe talk contribs m 24,757 bytes +115 →Formulas at prime powers: why template undo Tag: Visual edit

curprev 18:4518:45, 4 May 2021 Citation bot talk contribs 24,642 bytes +51 Add: s2cid. | Use this bot. Report bugs. | Suggested by Headbomb | Linked from Wikipedia:WikiProject_Academic_Journals/Journals_cited_by_Wikipedia/Sandbox | #UCB_webform_linked 242/999 undo

curprev 22:3022:30, 11 March 2021 YoshiGosu talk contribs 24,591 bytes −70 →Other properties and identities: I think the equation using the delta function was wrong. (and it doesn't appear in ref) undo Tag: Visual edit

curprev 17:3117:31, 8 January 2021 Monkbot talk contribs m 24,661 bytes +3 Task 18 (cosmetic): eval 14 templates: hyphenate params (3×); undo Tag: AWB

curprev 09:1809:18, 31 August 2020 212.17.33.98 talk 24,658 bytes +4 →Other properties and identities undo

curprev 17:0117:01, 27 July 2020 TdanTce talk contribs 24,654 bytes +1 →Table of values undo
curprev 17:0117:01, 27 July 2020 TdanTce talk contribs 24,653 bytes +1 →Table of values undo
curprev 17:0017:00, 27 July 2020 TdanTce talk contribs 24,652 bytes +26 →Table of values: changed "-" to "×" undo

curprev 01:5401:54, 23 June 2020 BHGbot talk contribs m 24,626 bytes 0 WP:BHGbot 6 (List 5): eponymous category first, per MOS:CATORDER; WP:GENFIXES undo Tag: AWB

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