Q: What is the sum of all factors of the number 21,135,231 excluding 21,135,231?

 A: 12,514,385

Why is 12,514,385 the sum of all factors of 21,135,231, excluding 21,135,231?

The factors of the number 21,135,231 are: 1, 3, 9, 13, 39, 43, 117, 129, 387, 559, 1677, 4201, 5031, 12603, 37809, 54613, 163839, 180643, 491517, 541929, 1625787, 2348359, 7045077, 21135231.

If you add them up, you will get the total of 21,135,243. Now subtract 21,135,231 to get 12,514,385


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