Q: What is the sum of all factors of the number 10,209 excluding 10,209?
A: 3,903
The factors of the number 10,209 are: 1, 3, 41, 83, 123, 249, 3403, 10209.
If you add them up, you will get the total of 10,212. Now subtract 10,209 to get 3,903