Cameron writes down the smallest positive multiple of 20 that is a perfect square, the smallest positive multiple of 20 that is a perfect cube, and all the multiples of 20 between them.  How many integers are in Cameron's list?
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Cameron writes down the smallest positive multiple of 20 that is a perfect square, the smallest positive multiple of 20 that is a perfect cube, and all the multiples of 20 between them.  How many integers are in Cameron's list?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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Cameron writes down the smallest positive multiple of 20 that is a perfect square, the smallest positive multiple of 20 that is a perfect cube, and all the multiples of 20 between them.  How many integers are in Cameron's list?
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