Q: What is the sum of all factors of the number 305,100 excluding 305,100?

A: 684,420

Why is 684,420 the sum of all factors of 305,100, excluding 305,100?

The factors of the number 305,100 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 54, 60, 75, 90, 100, 108, 113, 135, 150, 180, 225, 226, 270, 300, 339, 450, 452, 540, 565, 675, 678, 900, 1017, 1130, 1350, 1356, 1695, 2034, 2260, 2700, 2825, 3051, 3390, 4068, 5085, 5650, 6102, 6780, 8475, 10170, 11300, 12204, 15255, 16950, 20340, 25425, 30510, 33900, 50850, 61020, 76275, 101700, 152550, 305100.

If you add them up, you will get the total of 305,784. Now subtract 305,100 to get 684,420