Q: What is the sum of all factors of the number 135,520 excluding 135,520?

A: 266,672

Why is 266,672 the sum of all factors of 135,520, excluding 135,520?

The factors of the number 135,520 are: 1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 121, 140, 154, 160, 176, 220, 224, 242, 280, 308, 352, 385, 440, 484, 560, 605, 616, 770, 847, 880, 968, 1120, 1210, 1232, 1540, 1694, 1760, 1936, 2420, 2464, 3080, 3388, 3872, 4235, 4840, 6160, 6776, 8470, 9680, 12320, 13552, 16940, 19360, 27104, 33880, 67760, 135520.

If you add them up, you will get the total of 135,786. Now subtract 135,520 to get 266,672