Q: What is the sum of all factors of the number 21,960 including 21,960?

A: 72,540

Why is 72,540 the sum of all factors of 21,960, including 21,960?

The factors of the number 21,960 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 61, 72, 90, 120, 122, 180, 183, 244, 305, 360, 366, 488, 549, 610, 732, 915, 1098, 1220, 1464, 1830, 2196, 2440, 2745, 3660, 4392, 5490, 7320, 10980, 21960.

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