Express the monomial as a product of its factors.

Express 40 as a product of  1 · 2 · 2 · 2 · 5.

40m²n = 1 · 2 · 2 · 2 · 5 · m² · n

40m²n = 1 · 2 · 2 · 2 · 5 · m · m · n                  (Express m² as a product of m · m)

The factors of 40m²n = 1 · 2 · 2 · 2 · 5 · m · m · n.