Let us factorize each of them
$80 = 2^4 * 5$
$63 = 3^2 *7$
$135 = 3^3 *5$
$88 = 2 ^ 3 * 11$
The prime factors are 2,3,5,7,11
Any number which is a composite number and does not have factor any of above is the number and smallest is $13^2 = 169$
Let us factorize each of them
$80 = 2^4 * 5$
$63 = 3^2 *7$
$135 = 3^3 *5$
$88 = 2 ^ 3 * 11$
The prime factors are 2,3,5,7,11
Any number which is a composite number and does not have factor any of above is the number and smallest is $13^2 = 169$
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