Q: What is the sum of all factors of the number 639,764 excluding 639,764?

 A: 545,644

Why is 545,644 the sum of all factors of 639,764, excluding 639,764?

The factors of the number 639,764 are: 1, 2, 4, 41, 47, 82, 83, 94, 164, 166, 188, 332, 1927, 3403, 3854, 3901, 6806, 7708, 7802, 13612, 15604, 159941, 319882, 639764.

If you add them up, you will get the total of 640,309. Now subtract 639,764 to get 545,644


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