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

No Rating

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.)

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info