MPMP12: Marching Band Problem

Puzzle Video

You are creating a marching band. Your marching band must march in rows, but each row must have an equal number of performers in it. You want your marching band to be able to march in exactly 64 different formations.

Puzzle for Submission: What is the fewest number of performers you require for your marching band to have 64 marching options? (Only whole positive numbers will be accepted)

SOlution Video