Q: What is the sum of all factors of the number 1,400 excluding 1,400?
A: 2,320
The factors of the number 1,400 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 140, 175, 200, 280, 350, 700, 1400.
If you add them up, you will get the total of 1,402. Now subtract 1,400 to get 2,320