Q: What is the sum of all factors of the number 21,515 excluding 21,515?

A: 6,373

Why is 6,373 the sum of all factors of 21,515, excluding 21,515?

The factors of the number 21,515 are: 1, 5, 13, 65, 331, 1655, 4303, 21515.

If you add them up, you will get the total of 21,521. Now subtract 21,515 to get 6,373

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