Q: What is the sum of all factors of the number 1,266,800 excluding 1,266,800?

Why is 1,777,648 the sum of all factors of 1,266,800, excluding 1,266,800?

The factors of the number 1,266,800 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 3167, 6334, 12668, 15835, 25336, 31670, 50672, 63340, 79175, 126680, 158350, 253360, 316700, 633400, 1266800.

If you add them up, you will get the total of 1,266,801. Now subtract 1,266,800 to get 1,777,648

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