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2011-07-28, 17:03   #11
JohnFullspeed

May 2011
France

7·23 Posts
Aliquot

Quote:
 Do you mean 966 to 400 iterations? Using this system (2.6 GHz, Vista 64-bit, moderate load) it took about 35 minutes to get to iteration 385. I'll edit this later when it hits 100....
It's exactly what I want!!!!

TIPS : it is easy to compute the divisor sum sinc primes facto

I use
Sum = [ (p(a+1) - 1) / (p - 1) ] * [ (q(b+1) - 1) / (q - 1) ] * [ (r(c+1) - 1) / (r - 1) ] * ...

You have better???

I go back when I will be faster: this afternoon or this evening