Q: What is the sum of all factors of the number 213,099,999 excluding 213,099,999?

A: 118,209,057

Why is 118,209,057 the sum of all factors of 213,099,999, excluding 213,099,999?

The factors of the number 213,099,999 are: 1, 3, 7, 21, 67, 201, 311, 469, 487, 933, 1407, 1461, 2177, 3409, 6531, 10227, 20837, 32629, 62511, 97887, 145859, 151457, 228403, 437577, 454371, 685209, 1060199, 3180597, 10147619, 30442857, 71033333, 213099999.

If you add them up, you will get the total of 213,100,117. Now subtract 213,099,999 to get 118,209,057