B2. What is the largest integer $n$ such that the quantity
$$
\frac{50!}{(5!)^{n}}
$$
is an integer?
Note: Here $k!=1 \times 2 \times 3 \times \cdots \times k$ is the product of all integers from 1 to $k$. For example, $4!=1 \times 2 \times 3 \times 4=24$.