Q: What is the sum of all factors of the number 105,204,280 excluding 105,204,280?

Why is 131,505,440 the sum of all factors of 105,204,280, excluding 105,204,280?

The factors of the number 105,204,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 2630107, 5260214, 10520428, 13150535, 21040856, 26301070, 52602140, 105204280.

If you add them up, you will get the total of 105,204,411. Now subtract 105,204,280 to get 131,505,440

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