Euler Phi Function Of 91 - ProofWiki

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Example of Euler $\phi$ Function of Non-Square Semiprime

$\map \phi {91} = 72$

where $\phi$ denotes the Euler $\phi$ Function.

We have that:

$91 = 7 \times 13$

Thus:

$\ds \map \phi {91}$	$=$	$\ds \paren {7 - 1} \paren {13 - 1}$	Euler $\phi$ Function of Non-Square Semiprime
$\ds $	$=$	$\ds 6 \times 12$
$\ds $	$=$	$\ds 72$

$\blacksquare$

Từ khóa » Phi(91)

\(\ds \map \phi {91}\)	\(=\)	\(\ds \paren {7 - 1} \paren {13 - 1}\)	Euler $\phi$ Function of Non-Square Semiprime
\(\ds \)	\(=\)	\(\ds 6 \times 12\)
\(\ds \)	\(=\)	\(\ds 72\)