Q: What is the sum of all factors of the number 3,264,280 excluding 3,264,280?

Why is 4,180,520 the sum of all factors of 3,264,280, excluding 3,264,280?

The factors of the number 3,264,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1033, 1580, 2066, 3160, 4132, 5165, 8264, 10330, 20660, 41320, 81607, 163214, 326428, 408035, 652856, 816070, 1632140, 3264280.

If you add them up, you will get the total of 3,264,284. Now subtract 3,264,280 to get 4,180,520

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