Q: What is the sum of all factors of the number 1,277,900 including 1,277,900?

Why is 2,989,392 the sum of all factors of 1,277,900, including 1,277,900?

The factors of the number 1,277,900 are: 1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 983, 1300, 1966, 3932, 4915, 9830, 12779, 19660, 24575, 25558, 49150, 51116, 63895, 98300, 127790, 255580, 319475, 638950, 1277900.

If you add them up, you will get the total of 2,989,392.

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