Q: What is the sum of all factors of the number 3,107,780 excluding 3,107,780?

Why is 3,921,172 the sum of all factors of 3,107,780, excluding 3,107,780?

The factors of the number 3,107,780 are: 1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 11953, 23906, 47812, 59765, 119530, 155389, 239060, 310778, 621556, 776945, 1553890, 3107780.

If you add them up, you will get the total of 3,107,783. Now subtract 3,107,780 to get 3,921,172

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