perplexus.info :: Numbers : Summing the factors

Summing the factors (Posted on 2018-03-08)

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.

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