Q: What is the sum of all factors of the number 1,688,421 including 1,688,421?

Why is 2,757,888 the sum of all factors of 1,688,421, including 1,688,421?

The factors of the number 1,688,421 are: 1, 3, 7, 21, 37, 41, 53, 111, 123, 159, 259, 287, 371, 777, 861, 1113, 1517, 1961, 2173, 4551, 5883, 6519, 10619, 13727, 15211, 31857, 41181, 45633, 80401, 241203, 562807, 1688421.

If you add them up, you will get the total of 2,757,888.

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