Q: What is the sum of all factors of the number 19,800 including 19,800?

A: 72,540

Why is 72,540 the sum of all factors of 19,800, including 19,800?

The factors of the number 19,800 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 25, 30, 33, 36, 40, 44, 45, 50, 55, 60, 66, 72, 75, 88, 90, 99, 100, 110, 120, 132, 150, 165, 180, 198, 200, 220, 225, 264, 275, 300, 330, 360, 396, 440, 450, 495, 550, 600, 660, 792, 825, 900, 990, 1100, 1320, 1650, 1800, 1980, 2200, 2475, 3300, 3960, 4950, 6600, 9900, 19800.

If you add them up, you will get the total of 72,540.