Q: What is the sum of all factors of the number 81,440 excluding 81,440?
A: 111,340
The factors of the number 81,440 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 509, 1018, 2036, 2545, 4072, 5090, 8144, 10180, 16288, 20360, 40720, 81440.
If you add them up, you will get the total of 81,551. Now subtract 81,440 to get 111,340