Q: What is the sum of all factors of the number 128,542,280 excluding 128,542,280?

A: 161,961,520

Why is 161,961,520 the sum of all factors of 128,542,280, excluding 128,542,280?

The factors of the number 128,542,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 229, 458, 916, 1145, 1832, 2290, 4580, 9160, 14033, 28066, 56132, 70165, 112264, 140330, 280660, 561320, 3213557, 6427114, 12854228, 16067785, 25708456, 32135570, 64271140, 128542280.

If you add them up, you will get the total of 128,542,441. Now subtract 128,542,280 to get 161,961,520