Q: What is the sum of all factors of the number 2,175 excluding 2,175?
A: 1,545
The factors of the number 2,175 are: 1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175.
If you add them up, you will get the total of 2,176. Now subtract 2,175 to get 1,545