Q: What is the sum of all factors of the number 1,581,255 excluding 1,581,255?

A: 1,684,665

Why is 1,684,665 the sum of all factors of 1,581,255, excluding 1,581,255?

The factors of the number 1,581,255 are: 1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 53, 65, 85, 117, 135, 153, 159, 195, 221, 255, 265, 351, 459, 477, 585, 663, 689, 765, 795, 901, 1105, 1431, 1755, 1989, 2067, 2295, 2385, 2703, 3315, 3445, 4505, 5967, 6201, 7155, 8109, 9945, 10335, 11713, 13515, 18603, 24327, 29835, 31005, 35139, 40545, 58565, 93015, 105417, 121635, 175695, 316251, 527085, 1581255.

If you add them up, you will get the total of 1,581,256. Now subtract 1,581,255 to get 1,684,665