Q: What is the sum of all factors of the number 420,421,424 excluding 420,421,424?

 A: 442,061,320

Why is 442,061,320 the sum of all factors of 420,421,424, excluding 420,421,424?

The factors of the number 420,421,424 are: 1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 1545667, 3091334, 6182668, 12365336, 24730672, 26276339, 52552678, 105105356, 210210712, 420421424.

If you add them up, you will get the total of 420,421,866. Now subtract 420,421,424 to get 442,061,320


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