Q: What is the sum of all factors of the number 209,978 excluding 209,978?
A: 109,894
The factors of the number 209,978 are: 1, 2, 67, 134, 1567, 3134, 104989, 209978.
If you add them up, you will get the total of 210,087. Now subtract 209,978 to get 109,894