Abstract
In this paper we consider two functions related to the arithmetic and geometric means of element orders of a finite group, showing that certain lower bounds on such functions strongly affect the group structure. In particular, for every prime p, we prove a sufficient condition for a finite group to be p-nilpotent, that is, a group whose elements of -order form a normal subgroup. Moreover, we characterize finite cyclic groups with prescribed number of prime divisors.
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Acknowledgments
The authors are members of the “National Group for Algebraic and Geometric Structures, and their Applications” (GNSAGA - INdAM).