Q: What is the sum of all factors of the number 31,991 excluding 31,991?

 A: 1

Why is 1 the sum of all factors of 31,991, excluding 31,991?

The factors of the number 31,991 are: 1, 31991.

If you add them up, you will get the total of 31,992. Now subtract 31,991 to get 1


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