Q: What is the sum of all factors of the number 399,870 excluding 399,870?

 A: 667,170

Why is 667,170 the sum of all factors of 399,870, excluding 399,870?

The factors of the number 399,870 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270, 1481, 2962, 4443, 7405, 8886, 13329, 14810, 22215, 26658, 39987, 44430, 66645, 79974, 133290, 199935, 399870.

If you add them up, you will get the total of 400,537. Now subtract 399,870 to get 667,170


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