Q: What is the sum of all factors of the number 280,400 excluding 280,400?

 A: 394,222

Why is 394,222 the sum of all factors of 280,400, excluding 280,400?

The factors of the number 280,400 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 701, 1402, 2804, 3505, 5608, 7010, 11216, 14020, 17525, 28040, 35050, 56080, 70100, 140200, 280400.

If you add them up, you will get the total of 280,794. Now subtract 280,400 to get 394,222


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