Q: What is the sum of all factors of the number 664,640 excluding 664,640?

A: 993,472

Why is 993,472 the sum of all factors of 664,640, excluding 664,640?

The factors of the number 664,640 are: 1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 67, 80, 124, 134, 155, 160, 248, 268, 310, 320, 335, 496, 536, 620, 670, 992, 1072, 1240, 1340, 1984, 2077, 2144, 2480, 2680, 4154, 4288, 4960, 5360, 8308, 9920, 10385, 10720, 16616, 20770, 21440, 33232, 41540, 66464, 83080, 132928, 166160, 332320, 664640.

If you add them up, you will get the total of 665,633. Now subtract 664,640 to get 993,472