Q: What is the sum of all factors of the number 1,621,600 including 1,621,600?

Why is 3,960,684 the sum of all factors of 1,621,600, including 1,621,600?

The factors of the number 1,621,600 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 2027, 4054, 8108, 10135, 16216, 20270, 32432, 40540, 50675, 64864, 81080, 101350, 162160, 202700, 324320, 405400, 810800, 1621600.

If you add them up, you will get the total of 3,960,684.

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