Q: What is the sum of all factors of the number 25,780 excluding 25,780?
A: 28,400
The factors of the number 25,780 are: 1, 2, 4, 5, 10, 20, 1289, 2578, 5156, 6445, 12890, 25780.
If you add them up, you will get the total of 25,808. Now subtract 25,780 to get 28,400