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Summing the factors (Posted on 2018-03-08) Difficulty: 3 of 5
Let N=24* 57.

What is the sum of all N's positive factors?

Generalize.

  Submitted by Ady TZIDON    
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Solution: (Hide)
S= (2^5-1)*(5^8-1)/4 = 31*390624/4 = 3,027,336

Generalization is straightforward.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: a solutionarmando2018-03-09 03:42:06
Solutiona solutionCharlie2018-03-08 12:24:20
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