Q: What is the sum of all factors of the number 256,720 excluding 256,720?
A: 340,340
The factors of the number 256,720 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3209, 6418, 12836, 16045, 25672, 32090, 51344, 64180, 128360, 256720.
If you add them up, you will get the total of 257,060. Now subtract 256,720 to get 340,340