Q: What is the sum of all factors of the number 128,499 excluding 128,499?

Why is 75,021 the sum of all factors of 128,499, excluding 128,499?

The factors of the number 128,499 are: 1, 3, 7, 21, 29, 87, 203, 211, 609, 633, 1477, 4431, 6119, 18357, 42833, 128499.

If you add them up, you will get the total of 128,574. Now subtract 128,499 to get 75,021

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