Q: What is the sum of all factors of the number 11,991 excluding 11,991?
A: 6,313
The factors of the number 11,991 are: 1, 3, 7, 21, 571, 1713, 3997, 11991.
If you add them up, you will get the total of 11,997. Now subtract 11,991 to get 6,313