Q: What is the sum of all factors of the number 639,808 excluding 639,808?

 A: 729,252

Why is 729,252 the sum of all factors of 639,808, excluding 639,808?

The factors of the number 639,808 are: 1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 208, 416, 769, 832, 1538, 3076, 6152, 9997, 12304, 19994, 24608, 39988, 49216, 79976, 159952, 319904, 639808.

If you add them up, you will get the total of 640,537. Now subtract 639,808 to get 729,252


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