Q: What is the sum of all factors of the number 400,020,309 excluding 400,020,309?

A: 250,260,651

Why is 250,260,651 the sum of all factors of 400,020,309, excluding 400,020,309?

The factors of the number 400,020,309 are: 1, 3, 9, 13, 27, 39, 53, 117, 159, 351, 477, 689, 1431, 2067, 6201, 18603, 21503, 64509, 193527, 279539, 580581, 838617, 1139659, 2515851, 3418977, 7547553, 10256931, 14815567, 30770793, 44446701, 133340103, 400020309.

If you add them up, you will get the total of 400,020,559. Now subtract 400,020,309 to get 250,260,651