Q: What is the sum of all factors of the number 401,320 excluding 401,320?

 A: 520,280

Why is 520,280 the sum of all factors of 401,320, excluding 401,320?

The factors of the number 401,320 are: 1, 2, 4, 5, 8, 10, 20, 40, 79, 127, 158, 254, 316, 395, 508, 632, 635, 790, 1016, 1270, 1580, 2540, 3160, 5080, 10033, 20066, 40132, 50165, 80264, 100330, 200660, 401320.

If you add them up, you will get the total of 401,840. Now subtract 401,320 to get 520,280


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