Q: What is the sum of all factors of the number 21,287,531 excluding 21,287,531?

 A: 1

Why is 1 the sum of all factors of 21,287,531, excluding 21,287,531?

The factors of the number 21,287,531 are: 1, 21287531.

If you add them up, you will get the total of 21,287,532. Now subtract 21,287,531 to get 1


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