Q: What is the sum of all factors of the number 17,280 excluding 17,280?

A: 43,920

Why is 43,920 the sum of all factors of 17,280, excluding 17,280?

The factors of the number 17,280 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 64, 72, 80, 90, 96, 108, 120, 128, 135, 144, 160, 180, 192, 216, 240, 270, 288, 320, 360, 384, 432, 480, 540, 576, 640, 720, 864, 960, 1080, 1152, 1440, 1728, 1920, 2160, 2880, 3456, 4320, 5760, 8640, 17280.

If you add them up, you will get the total of 17,323. Now subtract 17,280 to get 43,920