Q: What is the sum of all factors of the number 21,681 excluding 21,681?
A: 13,839
The factors of the number 21,681 are: 1, 3, 9, 11, 27, 33, 73, 99, 219, 297, 657, 803, 1971, 2409, 7227, 21681.
If you add them up, you will get the total of 21,694. Now subtract 21,681 to get 13,839