Q: What is the sum of all factors of the number 87,210 excluding 87,210?

A: 171,990

Why is 171,990 the sum of all factors of 87,210, excluding 87,210?

The factors of the number 87,210 are: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 19, 27, 30, 34, 38, 45, 51, 54, 57, 85, 90, 95, 102, 114, 135, 153, 170, 171, 190, 255, 270, 285, 306, 323, 342, 459, 510, 513, 570, 646, 765, 855, 918, 969, 1026, 1530, 1615, 1710, 1938, 2295, 2565, 2907, 3230, 4590, 4845, 5130, 5814, 8721, 9690, 14535, 17442, 29070, 43605, 87210.

If you add them up, you will get the total of 87,381. Now subtract 87,210 to get 171,990