Q: What is the sum of all factors of the number 7,209 excluding 7,209?
A: 3,681
The factors of the number 7,209 are: 1, 3, 9, 27, 81, 89, 267, 801, 2403, 7209.
If you add them up, you will get the total of 7,212. Now subtract 7,209 to get 3,681