Q: What is the sum of all factors of the number 210,255,400 excluding 210,255,400?

Why is 278,588,870 the sum of all factors of 210,255,400, excluding 210,255,400?

The factors of the number 210,255,400 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 1051277, 2102554, 4205108, 5256385, 8410216, 10512770, 21025540, 26281925, 42051080, 52563850, 105127700, 210255400.

If you add them up, you will get the total of 210,255,678. Now subtract 210,255,400 to get 278,588,870

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