Find the common factors of the given term.

63m³n, 54mn⁴

Given: 63m³n, 54mn⁴

Let's factorize both terms.

$63m^{3}n=3\times 3\times 7\times m\times m\times m\times n$

$54m{n}^4=2\times 3\times 3\times 3\times m\times n\times n\times n\times n$

The two terms have 3 as two times and m, n as common factors in both the terms.

Hence, the common factors are: $3\times 3\times m\times n=9mn$