Q: What is the sum of all factors of the number 8,091 excluding 8,091?
A: 4,389
The factors of the number 8,091 are: 1, 3, 9, 29, 31, 87, 93, 261, 279, 899, 2697, 8091.
If you add them up, you will get the total of 8,095. Now subtract 8,091 to get 4,389