Q: What is the sum of all factors of the number 81,909 excluding 81,909?
A: 42,891
The factors of the number 81,909 are: 1, 3, 9, 19, 57, 171, 479, 1437, 4311, 9101, 27303, 81909.
If you add them up, you will get the total of 81,951. Now subtract 81,909 to get 42,891