Let k be a positive integer. In number theory, Jordan's totient function of a positive integer n is the number of k-tuples of positive integers all less than or equal to n that form a coprime (k + 1)-tuple together with n. This is a generalisation of Euler's totient function, which is J1. The function is named after Camille Jordan.
Read more about Jordan's Totient Function: Definition, Properties, Order of Matrix Groups, Examples
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