On a problem on a generalization of Euler's totient function

John M. Campbell

Büyükaşik et al. [Publ. Math. Debrecen, 2024] introduced a family of generalizations of Euler's totient function $\phi (n)$, by setting ${\phi }_k(n)={\sum }_a{a}^k$ for $a\in [1,n]$ such…