Q: What is the sum of all factors of the number 129,800 excluding 129,800?

A: 205,000

Why is 205,000 the sum of all factors of 129,800, excluding 129,800?

The factors of the number 129,800 are: 1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 59, 88, 100, 110, 118, 200, 220, 236, 275, 295, 440, 472, 550, 590, 649, 1100, 1180, 1298, 1475, 2200, 2360, 2596, 2950, 3245, 5192, 5900, 6490, 11800, 12980, 16225, 25960, 32450, 64900, 129800.

If you add them up, you will get the total of 130,005. Now subtract 129,800 to get 205,000