Let \phi(n) denote the number of positive integers less than or equal to n that are coprime to n. Find the sum of all 1<n<100 such that \phi(n) \mid n.
Let \phi(n) denote the number of positive integers less than or equal to n that are coprime to n. Find the sum of all 1<n<100 such that \phi(n) \mid n.