I need help to define an arithmetic function f_k related to a non negative integer k. For example f_k(720)= 2^gcd(4,k) * 3^gcd(2,k).
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I need help to define an arithmetic function f_k related to a non negative integer k. For example f_k(720)= 2^gcd(4,k) * 3^gcd(2,k).
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