Q: What is the sum of all factors of the number 3,315 excluding 3,315?
A: 2,733
The factors of the number 3,315 are: 1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315.
If you add them up, you will get the total of 3,317. Now subtract 3,315 to get 2,733