Numbers n such that sigma(n) = 7n/2.
4320, 4680, 26208, 20427264, 197064960, 21857648640, 57575890944
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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