Q: What is the sum of all factors of the number 6,435 excluding 6,435?

A: 6,669

Why is 6,669 the sum of all factors of 6,435, excluding 6,435?

The factors of the number 6,435 are: 1, 3, 5, 9, 11, 13, 15, 33, 39, 45, 55, 65, 99, 117, 143, 165, 195, 429, 495, 585, 715, 1287, 2145, 6435.

If you add them up, you will get the total of 6,441. Now subtract 6,435 to get 6,669

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