Q: What is the sum of all factors of the number 172,890 excluding 172,890?

A: 307,278

Why is 307,278 the sum of all factors of 172,890, excluding 172,890?

The factors of the number 172,890 are: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 51, 85, 90, 102, 113, 153, 170, 226, 255, 306, 339, 510, 565, 678, 765, 1017, 1130, 1530, 1695, 1921, 2034, 3390, 3842, 5085, 5763, 9605, 10170, 11526, 17289, 19210, 28815, 34578, 57630, 86445, 172890.

If you add them up, you will get the total of 173,197. Now subtract 172,890 to get 307,278