Q: What is the sum of all factors of the number 72,201,620 excluding 72,201,620?

Why is 79,421,824 the sum of all factors of 72,201,620, excluding 72,201,620?

The factors of the number 72,201,620 are: 1, 2, 4, 5, 10, 20, 3610081, 7220162, 14440324, 18050405, 36100810, 72201620.

If you add them up, you will get the total of 72,201,699. Now subtract 72,201,620 to get 79,421,824

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