Q: What is the sum of all factors of the number 11,990 excluding 11,990?
A: 11,770
The factors of the number 11,990 are: 1, 2, 5, 10, 11, 22, 55, 109, 110, 218, 545, 1090, 1199, 2398, 5995, 11990.
If you add them up, you will get the total of 12,001. Now subtract 11,990 to get 11,770