Q: What is the sum of all factors of the number 21,663 excluding 21,663?
A: 11,097
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