Q: What is the sum of all factors of the number 8,631 excluding 8,631?
A: 5,721
The factors of the number 8,631 are: 1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2877, 8631.
If you add them up, you will get the total of 8,636. Now subtract 8,631 to get 5,721