Q: What is the sum of all factors of the number 304,440 excluding 304,440?

A: 645,960

Why is 645,960 the sum of all factors of 304,440, excluding 304,440?

The factors of the number 304,440 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 43, 59, 60, 86, 118, 120, 129, 172, 177, 215, 236, 258, 295, 344, 354, 430, 472, 516, 590, 645, 708, 860, 885, 1032, 1180, 1290, 1416, 1720, 1770, 2360, 2537, 2580, 3540, 5074, 5160, 7080, 7611, 10148, 12685, 15222, 20296, 25370, 30444, 38055, 50740, 60888, 76110, 101480, 152220, 304440.

If you add them up, you will get the total of 305,085. Now subtract 304,440 to get 645,960