Q: What is the sum of all factors of the number 220,220 excluding 220,220?

A: 405,412

Why is 405,412 the sum of all factors of 220,220, excluding 220,220?

The factors of the number 220,220 are: 1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 121, 130, 140, 143, 154, 182, 220, 242, 260, 286, 308, 364, 385, 455, 484, 572, 605, 715, 770, 847, 910, 1001, 1210, 1430, 1540, 1573, 1694, 1820, 2002, 2420, 2860, 3146, 3388, 4004, 4235, 5005, 6292, 7865, 8470, 10010, 11011, 15730, 16940, 20020, 22022, 31460, 44044, 55055, 110110, 220220.

If you add them up, you will get the total of 220,625. Now subtract 220,220 to get 405,412