Q: What is the sum of all factors of the number 212,212,100 excluding 212,212,100?

A: 252,536,800

Why is 252,536,800 the sum of all factors of 212,212,100, excluding 212,212,100?

The factors of the number 212,212,100 are: 1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 218, 436, 545, 1090, 2180, 2725, 5450, 10900, 19469, 38938, 77876, 97345, 194690, 389380, 486725, 973450, 1946900, 2122121, 4244242, 8488484, 10610605, 21221210, 42442420, 53053025, 106106050, 212212100.

If you add them up, you will get the total of 212,212,352. Now subtract 212,212,100 to get 252,536,800