Numbers n with half-integral abundancy index, sigma(n)/n = k+1/2 with integer k.
2, 24, 4320, 4680, 26208, 8910720, 17428320, 20427264, 91963648, 197064960
3 seqfan posts
Tue Dec 13 15:17:44 CET 2011 [seqfan] Re: Meanings
Tue Dec 13 15:04:38 CET 2011 [seqfan] Re: Meanings
Tue Dec 13 10:57:49 CET 2011 [seqfan] Meanings
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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