On a problem of Chen and Liu concerning the prime power factorization of $n!$

Details On a problem of Chen and Liu concerning the prime power factorization of $n!$ On a problem of Chen and Liu concerning the prime power factorization of $n!$

2011-10-21

arxiv.org/abs/1110.4814v1

Mathematics

Number Theory

9 pages

Scientific paper

For a fixed prime $p$, let $e_p(n!)$ denote the order of $p$ in the prime factorization of $n!$. Chen and Liu (2007) asked whether for any fixed $m$, one has $\{e_p(n^2!) \bmod m:\; n\in\mathbb{Z}\}=\mathbb{Z}_m$ and $\{e_p(q!) \bmod m:\; q {prime}\}=\mathbb{Z}_m$. We answer these two questions and show asymptotic formulas for $# \{n

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