Abstract
Let be a finite field of order q, t be a prime and
be positive integers. In this article, we find all irreducible divisors of
over
where
and
such that
are distinct odd primes and c is a positive integer with
and
Moreover, we construct an a-constacyclic code by using these irreducible divisors.
Acknowledgments
The authors would like to thank the referees for their useful suggestions.