Q: What is the sum of all factors of the number 520,220 excluding 520,220?

 A: 661,660

Why is 661,660 the sum of all factors of 520,220, excluding 520,220?

The factors of the number 520,220 are: 1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 370, 380, 703, 740, 1369, 1406, 2738, 2812, 3515, 5476, 6845, 7030, 13690, 14060, 26011, 27380, 52022, 104044, 130055, 260110, 520220.

If you add them up, you will get the total of 520,881. Now subtract 520,220 to get 661,660


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