Q: What is the sum of all factors of the number 1,245,780 including 1,245,780?

A: 3,913,140

Why is 3,913,140 the sum of all factors of 1,245,780, including 1,245,780?

The factors of the number 1,245,780 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 769, 810, 1538, 1620, 2307, 3076, 3845, 4614, 6921, 7690, 9228, 11535, 13842, 15380, 20763, 23070, 27684, 34605, 41526, 46140, 62289, 69210, 83052, 103815, 124578, 138420, 207630, 249156, 311445, 415260, 622890, 1245780.

If you add them up, you will get the total of 3,913,140.