Jon teaches a fourth grade class at an elementary school where class sizes are always at least 20 students and at most 28.  One day Jon decides that he wants to arrange the students in their desks in a rectangular grid with no gaps.  Unfortunately for Jon he discovers that doing so could only result in one straight line of desks.  How many students does Jon have in his class?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jon teaches a fourth grade class at an elementary school where class sizes are always at least 20 students and at most 28.  One day Jon decides that he wants to arrange the students in their desks in a rectangular grid with no gaps.  Unfortunately for Jon he discovers that doing so could only result in one straight line of desks.  How many students does Jon have in his class?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
23
Jon teaches a fourth grade class at an elementary school where class sizes are always at least 20 students and at most 28.  One day Jon decides that he wants to arrange the students in their desks in a rectangular grid with no gaps.  Unfortunately for Jon he discovers that doing so could only result in one straight line of desks.  How many students does Jon have in his class?
train