Answer
$56 = 2\cdot 2\cdot 2\cdot 7$
Work Step by Step
The $\textit{prime factorization}$ of a number is obtained by writing the number as a product of primes.
To determine the prime factorization of $56$ we write the number as a product of factors and continue the process until all factors are prime numbers.
We start by writing $56$ as a product of two numbers:
$56=2\cdot 28$.
The number $2$ is prime, but $28$ is not. So we write $28=2\cdot 14$:
$56=2\cdot 2\cdot 14$.
As $14$ is not a prime number we write: $14=2\cdot 7$ and we have:
$56=2\cdot 2\cdot 2\cdot 7$.
Now each factor is a prime number, therefore the prime factorization of $56$ is $2\cdot 2\cdot 2\cdot 7$.