Q: What is the sum of all factors of the number 256,480 excluding 256,480?

A: 439,040

Why is 439,040 the sum of all factors of 256,480, excluding 256,480?

The factors of the number 256,480 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 229, 280, 458, 560, 916, 1120, 1145, 1603, 1832, 2290, 3206, 3664, 4580, 6412, 7328, 8015, 9160, 12824, 16030, 18320, 25648, 32060, 36640, 51296, 64120, 128240, 256480.

If you add them up, you will get the total of 256,919. Now subtract 256,480 to get 439,040