Q: What is the sum of all factors of the number 3,321 excluding 3,321?
A: 1,761
The factors of the number 3,321 are: 1, 3, 9, 27, 41, 81, 123, 369, 1107, 3321.
If you add them up, you will get the total of 3,322. Now subtract 3,321 to get 1,761