Q: What is the sum of all factors of the number 2,499 excluding 2,499?
A: 1,605
The factors of the number 2,499 are: 1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499.
If you add them up, you will get the total of 2,500. Now subtract 2,499 to get 1,605