Values of Euler\'s function: $\varphi(17)$, $\varphi(p)$, $\varphi(p^2)$, $\varphi(p^\alpha)$

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Values of Euler\'s function: $\varphi(17)$, $\varphi(p)$, $\varphi(p^2)$, $\varphi(p^\alpha)$ · Prove2Me