Numbers n such that sigma(n)/n = 9/2.
8910720, 17428320, 8583644160, 57629644800, 206166804480
3 seqfan posts
Thu Jun 18 15:46:36 CEST 2009 [seqfan] Re: A055153 and A141645
Thu Jun 18 08:54:09 CEST 2009 [seqfan] A055153 and A141645
Mon Oct 27 03:46:02 CET 2008 [seqfan] RE : Semi Intefer MPN
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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