Q: What is the sum of all factors of the number 310,991 excluding 310,991?

 A: 1,321

Why is 1,321 the sum of all factors of 310,991, excluding 310,991?

The factors of the number 310,991 are: 1, 307, 1013, 310991.

If you add them up, you will get the total of 310,992. Now subtract 310,991 to get 1,321


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