Q: What is the sum of all factors of the number 123,456,780 including 123,456,780?

A: 382,479,552

Why is 382,479,552 the sum of all factors of 123,456,780, including 123,456,780?

The factors of the number 123,456,780 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 47, 60, 90, 94, 141, 180, 188, 235, 282, 423, 470, 564, 705, 846, 940, 1410, 1692, 2115, 2820, 4230, 8460, 14593, 29186, 43779, 58372, 72965, 87558, 131337, 145930, 175116, 218895, 262674, 291860, 437790, 525348, 656685, 685871, 875580, 1313370, 1371742, 2057613, 2626740, 2743484, 3429355, 4115226, 6172839, 6858710, 8230452, 10288065, 12345678, 13717420, 20576130, 24691356, 30864195, 41152260, 61728390, 123456780.

If you add them up, you will get the total of 382,479,552.