Q: What is the sum of all factors of the number 77,780 excluding 77,780?
A: 85,600
The factors of the number 77,780 are: 1, 2, 4, 5, 10, 20, 3889, 7778, 15556, 19445, 38890, 77780.
If you add them up, you will get the total of 77,865. Now subtract 77,780 to get 85,600