Q: What is the sum of all factors of the number 2,709 excluding 2,709?
A: 1,867
The factors of the number 2,709 are: 1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709.
If you add them up, you will get the total of 2,710. Now subtract 2,709 to get 1,867