Q: What is the sum of all factors of the number 21,231,440 excluding 21,231,440?

 A: 29,343,448

Why is 29,343,448 the sum of all factors of 21,231,440, excluding 21,231,440?

The factors of the number 21,231,440 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6473, 12946, 25892, 32365, 51784, 64730, 103568, 129460, 258920, 265393, 517840, 530786, 1061572, 1326965, 2123144, 2653930, 4246288, 5307860, 10615720, 21231440.

If you add them up, you will get the total of 21,231,469. Now subtract 21,231,440 to get 29,343,448


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