Q: What is the sum of all factors of the number 687,431,321 excluding 687,431,321?

 A: 1

Why is 1 the sum of all factors of 687,431,321, excluding 687,431,321?

The factors of the number 687,431,321 are: 1, 687431321.

If you add them up, you will get the total of 687,431,322. Now subtract 687,431,321 to get 1


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