Q: What is the sum of all factors of the number 63,978 excluding 63,978?
A: 63,990
The factors of the number 63,978 are: 1, 2, 3, 6, 10663, 21326, 31989, 63978.
If you add them up, you will get the total of 64,041. Now subtract 63,978 to get 63,990