Q: What is the sum of all factors of the number 211,380 excluding 211,380?

A: 428,364

Why is 428,364 the sum of all factors of 211,380, excluding 211,380?

The factors of the number 211,380 are: 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 271, 390, 542, 780, 813, 1084, 1355, 1626, 2710, 3252, 3523, 4065, 5420, 7046, 8130, 10569, 14092, 16260, 17615, 21138, 35230, 42276, 52845, 70460, 105690, 211380.

If you add them up, you will get the total of 211,808. Now subtract 211,380 to get 428,364