Q: What is the sum of all factors of the number 818,560 excluding 818,560?

Why is 1,139,840 the sum of all factors of 818,560, excluding 818,560?

The factors of the number 818,560 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 1279, 2558, 5116, 6395, 10232, 12790, 20464, 25580, 40928, 51160, 81856, 102320, 163712, 204640, 409280, 818560.

If you add them up, you will get the total of 818,561. Now subtract 818,560 to get 1,139,840

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