Q: What is the sum of all factors of the number 15,551,000 excluding 15,551,000?

Why is 20,840,680 the sum of all factors of 15,551,000, excluding 15,551,000?

The factors of the number 15,551,000 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 15551, 31102, 62204, 77755, 124408, 155510, 311020, 388775, 622040, 777550, 1555100, 1943875, 3110200, 3887750, 7775500, 15551000.

If you add them up, you will get the total of 15,551,020. Now subtract 15,551,000 to get 20,840,680

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