Q: What is the sum of all factors of the number 388,438,940 including 388,438,940?

Why is 823,210,080 the sum of all factors of 388,438,940, including 388,438,940?

The factors of the number 388,438,940 are: 1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 178183, 356366, 712732, 890915, 1781830, 3563660, 19421947, 38843894, 77687788, 97109735, 194219470, 388438940.

If you add them up, you will get the total of 823,210,080.

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