Problem #131
Crazy sum
Let f ( n ) = \sum_{ d | n } \mu ( d ) h ( n / d ) where h ( x ) = Sum of divisors of x
g ( n ) = \sum_{ d | n } \mu ( d ) f ( n / d )
Find S=\sum_{ n = 1 }^{10000000000} g ( n ) modulo 2^{64}
Note: here \mu ( n ) is Mobius Function.