[seqfan] Re: Destinies of sums of proper divisors.
Hans Havermann
pxp at rogers.com
Mon Jul 6 02:46:48 CEST 2009
Maximilian Hasler:
> I must admit that dest(99225) still takes some time to compute...
Indeed. The destiny is identical to that of the smaller 46758:
0 46758 99225
1 46770 114582
2 65550 135762
3 113010 180462
4 158286 199698
5 191922 205518
6 205518 ...
so I looked for dest(46758), first using Mathematica to #472, then one
at a time (copy/paste) using Dario Alpern's online ECM-factorization
applet to #547 (< #546). #547 (assuming I didn't make any mistakes) is:
220856107213904390193665654934000814055972896201951406931845871108450633171297110864659603360
According to Wolfgang Creyaufmueller's online tables
http://www.aliquot.de/tabellen/tables.htm
46758 has been indexed up to #666 where we have the 101-digit
42291149432355095308926992983480450623448873555059382537140396682361170391404079245409226419855814760
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