Q: What is the sum of all factors of the number 8,280 excluding 8,280?

A: 19,800

Why is 19,800 the sum of all factors of 8,280, excluding 8,280?

The factors of the number 8,280 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 23, 24, 30, 36, 40, 45, 46, 60, 69, 72, 90, 92, 115, 120, 138, 180, 184, 207, 230, 276, 345, 360, 414, 460, 552, 690, 828, 920, 1035, 1380, 1656, 2070, 2760, 4140, 8280.

If you add them up, you will get the total of 8,299. Now subtract 8,280 to get 19,800