Q: What is the sum of all factors of the number 21,663 excluding 21,663?

 A: 11,097

Why is 11,097 the sum of all factors of 21,663, excluding 21,663?

The factors of the number 21,663 are: 1, 3, 9, 29, 83, 87, 249, 261, 747, 2407, 7221, 21663.

If you add them up, you will get the total of 21,674. Now subtract 21,663 to get 11,097


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