Q: What is the sum of all factors of the number 309,420 excluding 309,420?

A: 666,324

Why is 666,324 the sum of all factors of 309,420, excluding 309,420?

The factors of the number 309,420 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 191, 270, 324, 382, 405, 540, 573, 764, 810, 955, 1146, 1620, 1719, 1910, 2292, 2865, 3438, 3820, 5157, 5730, 6876, 8595, 10314, 11460, 15471, 17190, 20628, 25785, 30942, 34380, 51570, 61884, 77355, 103140, 154710, 309420.

If you add them up, you will get the total of 310,086. Now subtract 309,420 to get 666,324