The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A005231 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A005231

Odd abundant numbers (odd numbers m whose sum of divisors exceeds 2m).
(history; published version)

#114 by Michael De Vlieger at Fri Oct 04 10:02:35 EDT 2024

STATUS

reviewed

approved

#113 by Michel Marcus at Fri Oct 04 09:25:55 EDT 2024

STATUS

proposed

reviewed

#112 by Stefano Spezia at Fri Oct 04 01:01:06 EDT 2024

STATUS

editing

proposed

#111 by Stefano Spezia at Fri Oct 04 00:59:51 EDT 2024

LINKS

Tyler Ross, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL27/Ross/ross3.html">A Perfect Number Generalization and Some Euclid-Euler Type Results</a>, Journal of Integer Sequences, Vol. 27 (2024), Article 24.7.5. See p. 10.

STATUS

approved

editing

#110 by Michael De Vlieger at Sat Nov 18 08:36:34 EST 2023

STATUS

reviewed

approved

#109 by Joerg Arndt at Sat Nov 18 06:54:47 EST 2023

STATUS

proposed

reviewed

#108 by Max Alekseyev at Fri Nov 17 13:52:38 EST 2023

STATUS

editing

proposed

#107 by Max Alekseyev at Fri Nov 17 13:52:35 EST 2023

COMMENTS

There exist infinitely many terms m such that 2*m+1 is also a term. An example of such a term is given by m = 1794034002010052015087494897751274857875985571808130707987847768908867571007187. - Max Alekseyev, Nov 16 2023

STATUS

proposed

editing

#106 by Max Alekseyev at Fri Nov 17 13:50:19 EST 2023

STATUS

editing

proposed

#105 by Max Alekseyev at Fri Nov 17 13:50:15 EST 2023

COMMENTS

There exist infinitely many terms m such that 2*m+1 is also a term. An example of such a term is given by m = 2970461716671401076599496434094339820184155696343481615007763926638583667753360431002667488823171794034002010052015087494897751274857875. - Max Alekseyev, Nov 16 2023

STATUS

proposed

editing