Q: What is the sum of all factors of the number 10,920 including 10,920?

A: 40,320

Why is 40,320 the sum of all factors of 10,920, including 10,920?

The factors of the number 10,920 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 52, 56, 60, 65, 70, 78, 84, 91, 104, 105, 120, 130, 140, 156, 168, 182, 195, 210, 260, 273, 280, 312, 364, 390, 420, 455, 520, 546, 728, 780, 840, 910, 1092, 1365, 1560, 1820, 2184, 2730, 3640, 5460, 10920.

If you add them up, you will get the total of 40,320.