Q: What is the sum of all factors of the number 21,086 excluding 21,086?
A: 13,018
The factors of the number 21,086 are: 1, 2, 13, 26, 811, 1622, 10543, 21086.
If you add them up, you will get the total of 21,099. Now subtract 21,086 to get 13,018