Q: What is the sum of all factors of the number 640,548 including 640,548?

Why is 1,681,680 the sum of all factors of 640,548, including 640,548?

The factors of the number 640,548 are: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 659, 972, 1318, 1977, 2636, 3954, 5931, 7908, 11862, 17793, 23724, 35586, 53379, 71172, 106758, 160137, 213516, 320274, 640548.

If you add them up, you will get the total of 1,681,680.

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