Q: What is the sum of all factors of the number 1,921 excluding 1,921?

 A: 131

Why is 131 the sum of all factors of 1,921, excluding 1,921?

The factors of the number 1,921 are: 1, 17, 113, 1921.

If you add them up, you will get the total of 2,052. Now subtract 1,921 to get 131


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