Q: What is the sum of all factors of the number 21,351 excluding 21,351?

 A: 9,753

Why is 9,753 the sum of all factors of 21,351, excluding 21,351?

The factors of the number 21,351 are: 1, 3, 11, 33, 647, 1941, 7117, 21351.

If you add them up, you will get the total of 21,360. Now subtract 21,351 to get 9,753


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