Let x be an integer greater than 1.
\begin{itemize}
\item $\frac { 64 } { \mathrm { x } }$ is an integer,
\item $\frac { \ln 64 } { \ln x }$ is not an integer.
\end{itemize}
Accordingly, what is the sum of the values that x can take?\\
A) 40\\
B) 42\\
C) 48\\
D) 54\\
E) 56