Powerful numbers in (1^ℓ + q^ℓ)(2^ℓ + q^ℓ)⋯(n^ℓ + q^ℓ)

Quan-Hui Yang; Qing-Qing Zhao

Comptes Rendus. Mathématique, Volume 356 (2018) no. 1 p. 13-16