Q: What is the sum of all factors of the number 21,513 excluding 21,513?
A: 7,863
The factors of the number 21,513 are: 1, 3, 71, 101, 213, 303, 7171, 21513.
If you add them up, you will get the total of 21,520. Now subtract 21,513 to get 7,863