Q: What is the sum of all factors of the number 20,800 excluding 20,800?

 A: 34,318

Why is 34,318 the sum of all factors of 20,800, excluding 20,800?

The factors of the number 20,800 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 130, 160, 200, 208, 260, 320, 325, 400, 416, 520, 650, 800, 832, 1040, 1300, 1600, 2080, 2600, 4160, 5200, 10400, 20800.

If you add them up, you will get the total of 20,834. Now subtract 20,800 to get 34,318


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