Q: What is the sum of all factors of the number 279,990 excluding 279,990?

A: 523,530

Why is 523,530 the sum of all factors of 279,990, excluding 279,990?

The factors of the number 279,990 are: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 27, 30, 34, 45, 51, 54, 61, 85, 90, 102, 122, 135, 153, 170, 183, 255, 270, 305, 306, 366, 459, 510, 549, 610, 765, 915, 918, 1037, 1098, 1530, 1647, 1830, 2074, 2295, 2745, 3111, 3294, 4590, 5185, 5490, 6222, 8235, 9333, 10370, 15555, 16470, 18666, 27999, 31110, 46665, 55998, 93330, 139995, 279990.

If you add them up, you will get the total of 280,513. Now subtract 279,990 to get 523,530