Q: What is the sum of all factors of the number 388,620 excluding 388,620?

A: 869,364

Why is 869,364 the sum of all factors of 388,620, excluding 388,620?

The factors of the number 388,620 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 127, 153, 170, 180, 204, 254, 255, 306, 340, 381, 508, 510, 612, 635, 762, 765, 1020, 1143, 1270, 1524, 1530, 1905, 2159, 2286, 2540, 3060, 3810, 4318, 4572, 5715, 6477, 7620, 8636, 10795, 11430, 12954, 19431, 21590, 22860, 25908, 32385, 38862, 43180, 64770, 77724, 97155, 129540, 194310, 388620.

If you add them up, you will get the total of 389,489. Now subtract 388,620 to get 869,364