Q: What is the sum of all factors of the number 21,091,520 excluding 21,091,520?

A: 31,791,280

Why is 31,791,280 the sum of all factors of 21,091,520, excluding 21,091,520?

The factors of the number 21,091,520 are: 1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 152, 160, 190, 304, 320, 380, 608, 760, 1216, 1520, 3040, 3469, 6080, 6938, 13876, 17345, 27752, 34690, 55504, 65911, 69380, 111008, 131822, 138760, 222016, 263644, 277520, 329555, 527288, 555040, 659110, 1054576, 1110080, 1318220, 2109152, 2636440, 4218304, 5272880, 10545760, 21091520.

If you add them up, you will get the total of 21,091,551. Now subtract 21,091,520 to get 31,791,280