Q: What is the sum of all factors of the number 1,663,623 excluding 1,663,623?

Why is 979,017 the sum of all factors of 1,663,623, excluding 1,663,623?

The factors of the number 1,663,623 are: 1, 3, 9, 13, 39, 59, 117, 177, 241, 531, 723, 767, 2169, 2301, 3133, 6903, 9399, 14219, 28197, 42657, 127971, 184847, 554541, 1663623.

If you add them up, you will get the total of 1,664,602. Now subtract 1,663,623 to get 979,017

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