Q: What is the sum of all factors of the number 21,280 including 21,280?

A: 60,480

Why is 60,480 the sum of all factors of 21,280, including 21,280?

The factors of the number 21,280 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 160, 190, 224, 266, 280, 304, 380, 532, 560, 608, 665, 760, 1064, 1120, 1330, 1520, 2128, 2660, 3040, 4256, 5320, 10640, 21280.

If you add them up, you will get the total of 60,480.