Q: What is the sum of all factors of the number 27,978 excluding 27,978?
A: 27,990
The factors of the number 27,978 are: 1, 2, 3, 6, 4663, 9326, 13989, 27978.
If you add them up, you will get the total of 28,005. Now subtract 27,978 to get 27,990