Q: What is the sum of all factors of the number 403,040 excluding 403,040?

A: 640,240

Why is 640,240 the sum of all factors of 403,040, excluding 403,040?

The factors of the number 403,040 are: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 229, 352, 440, 458, 880, 916, 1145, 1760, 1832, 2290, 2519, 3664, 4580, 5038, 7328, 9160, 10076, 12595, 18320, 20152, 25190, 36640, 40304, 50380, 80608, 100760, 201520, 403040.

If you add them up, you will get the total of 403,680. Now subtract 403,040 to get 640,240