MathDB
2021 USMCA National Championship #1

Source:

May 9, 2021

Problem Statement

Let a1,a2,,a2021a_1, a_2, \ldots, a_{2021} be a sequence, where each aia_i is a positive factor of 20212021. How many possible values are there for the product a1a2a2021a_1 a_2 \cdots a_{2021}?