Q: What is the sum of all factors of the number 642,012,400 excluding 642,012,400?

A: 900,423,352

Why is 900,423,352 the sum of all factors of 642,012,400, excluding 642,012,400?

The factors of the number 642,012,400 are: 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 1605031, 3210062, 6420124, 8025155, 12840248, 16050310, 25680496, 32100620, 40125775, 64201240, 80251550, 128402480, 160503100, 321006200, 642012400.

If you add them up, you will get the total of 642,013,300. Now subtract 642,012,400 to get 900,423,352