Q: What is the sum of all factors of the number 20,780 excluding 20,780?

A: 22,900

Why is 22,900 the sum of all factors of 20,780, excluding 20,780?

The factors of the number 20,780 are: 1, 2, 4, 5, 10, 20, 1039, 2078, 4156, 5195, 10390, 20780.

If you add them up, you will get the total of 20,802. Now subtract 20,780 to get 22,900

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