Q: What is the sum of all factors of the number 12,246,440 excluding 12,246,440?

Why is 15,457,720 the sum of all factors of 12,246,440, excluding 12,246,440?

The factors of the number 12,246,440 are: 1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1451, 1688, 2110, 2902, 4220, 5804, 7255, 8440, 11608, 14510, 29020, 58040, 306161, 612322, 1224644, 1530805, 2449288, 3061610, 6123220, 12246440.

If you add them up, you will get the total of 12,246,455. Now subtract 12,246,440 to get 15,457,720

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