Q: What is the sum of all factors of the number 420,305,145 excluding 420,305,145?

A: 321,590,919

Why is 321,590,919 the sum of all factors of 420,305,145, excluding 420,305,145?

The factors of the number 420,305,145 are: 1, 3, 5, 13, 15, 39, 41, 65, 123, 195, 205, 533, 615, 1599, 2665, 7995, 52571, 157713, 262855, 683423, 788565, 2050269, 2155411, 3417115, 6466233, 10251345, 10777055, 28020343, 32331165, 84061029, 140101715, 420305145.

If you add them up, you will get the total of 420,305,466. Now subtract 420,305,145 to get 321,590,919