Q: What is the sum of all factors of the number 285,640 excluding 285,640?

 A: 377,840

Why is 377,840 the sum of all factors of 285,640, excluding 285,640?

The factors of the number 285,640 are: 1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 193, 296, 370, 386, 740, 772, 965, 1480, 1544, 1930, 3860, 7141, 7720, 14282, 28564, 35705, 57128, 71410, 142820, 285640.

If you add them up, you will get the total of 286,017. Now subtract 285,640 to get 377,840


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