Q: What is the sum of all factors of the number 81,625 excluding 81,625?

 A: 20,399

Why is 20,399 the sum of all factors of 81,625, excluding 81,625?

The factors of the number 81,625 are: 1, 5, 25, 125, 653, 3265, 16325, 81625.

If you add them up, you will get the total of 81,645. Now subtract 81,625 to get 20,399


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