Q: What is the sum of all factors of the number 20,565 excluding 20,565?
A: 15,159
The factors of the number 20,565 are: 1, 3, 5, 9, 15, 45, 457, 1371, 2285, 4113, 6855, 20565.
If you add them up, you will get the total of 20,580. Now subtract 20,565 to get 15,159