$N^2$ is a divisor of $8!$. What is the greatest possible integer value of $N$?  (Reminder: For a positive integer $n$, the expression $n!$ stands for the product of the integers from 1 up to (and including) $n$.)
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
$N^2$ is a divisor of $8!$. What is the greatest possible integer value of $N$?  (Reminder: For a positive integer $n$, the expression $n!$ stands for the product of the integers from 1 up to (and including) $n$.)
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
24
$N^2$ is a divisor of $8!$. What is the greatest possible integer value of $N$?  (Reminder: For a positive integer $n$, the expression $n!$ stands for the product of the integers from 1 up to (and including) $n$.)
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