Q: What is the sum of all factors of the number 10,815 excluding 10,815?
A: 9,153
The factors of the number 10,815 are: 1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 2163, 3605, 10815.
If you add them up, you will get the total of 10,824. Now subtract 10,815 to get 9,153