Q: What is the sum of all factors of the number 1,818,201 excluding 1,818,201?

Why is 1,388,967 the sum of all factors of 1,818,201, excluding 1,818,201?

The factors of the number 1,818,201 are: 1, 3, 7, 11, 17, 21, 33, 51, 77, 119, 187, 231, 357, 463, 561, 1309, 1389, 3241, 3927, 5093, 7871, 9723, 15279, 23613, 35651, 55097, 86581, 106953, 165291, 259743, 606067, 1818201.

If you add them up, you will get the total of 1,818,202. Now subtract 1,818,201 to get 1,388,967

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