Q: What is the sum of all factors of the number 12,687,870 excluding 12,687,870?

Why is 20,106,402 the sum of all factors of 12,687,870, excluding 12,687,870?

The factors of the number 12,687,870 are: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 32533, 65066, 97599, 162665, 195198, 325330, 422929, 487995, 845858, 975990, 1268787, 2114645, 2537574, 4229290, 6343935, 12687870.

If you add them up, you will get the total of 12,687,890. Now subtract 12,687,870 to get 20,106,402

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