Q: What is the sum of all factors of the number 31,200 excluding 31,200?

A: 78,168

Why is 78,168 the sum of all factors of 31,200, excluding 31,200?

The factors of the number 31,200 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 25, 26, 30, 32, 39, 40, 48, 50, 52, 60, 65, 75, 78, 80, 96, 100, 104, 120, 130, 150, 156, 160, 195, 200, 208, 240, 260, 300, 312, 325, 390, 400, 416, 480, 520, 600, 624, 650, 780, 800, 975, 1040, 1200, 1248, 1300, 1560, 1950, 2080, 2400, 2600, 3120, 3900, 5200, 6240, 7800, 10400, 15600, 31200.

If you add them up, you will get the total of 31,278. Now subtract 31,200 to get 78,168