Integers whose Ratio between Divisor Sum and Phi is Square/Examples/714

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Example of Integer whose Ratio between Divisor Sum and Phi is Square

\(\ds \map \phi {714}\) \(=\) \(\ds 192\) $\phi$ of $714$
\(\ds \map {\sigma_1} {714}\) \(=\) \(\ds 1728\) $\sigma_1$ of $714$
\(\ds \map {\sigma_1} {714} / \map \phi {714}\) \(=\) \(\ds 1728 / 192\)
\(\ds \) \(=\) \(\ds 9\)
\(\ds \) \(=\) \(\ds 3^2\)

$\blacksquare$


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