=
+
= 1 +
Therefore
will be an integer if and only if 24 is
evenly divisible by n. Therefore the only integer values
n can have are 1,2,3,4,6,8,12, and 24, that is, the divisors of 24.
And the sum of the divisors of 24 is:
1+2+3+4+6+8+12+24 = 60
Edwin