Q: What is the sum of all factors of the number 423,780 excluding 423,780?

A: 933,660

Why is 933,660 the sum of all factors of 423,780, excluding 423,780?

The factors of the number 423,780 are: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 1009, 2018, 3027, 4036, 5045, 6054, 7063, 10090, 12108, 14126, 15135, 20180, 21189, 28252, 30270, 35315, 42378, 60540, 70630, 84756, 105945, 141260, 211890, 423780.

If you add them up, you will get the total of 424,713. Now subtract 423,780 to get 933,660