Q: What is the sum of all factors of the number 21,609 excluding 21,609?
A: 14,804
The factors of the number 21,609 are: 1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 2401, 3087, 7203, 21609.
If you add them up, you will get the total of 21,623. Now subtract 21,609 to get 14,804