Why is 85,680 the sum of all factors of 40,780, including 40,780?
The factors of the number 40,780 are: 1, 2, 4, 5, 10, 20, 2039, 4078, 8156, 10195, 20390, 40780.
If you add them up, you will get the total of 85,680.
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