The product of an integer a and 1080 is a complete square, and the minimum value of a is______ .

The product of an integer a and 1080 is a complete square, and the minimum value of a is______ .

Because 1080 × A is a complete square number, after factoring the prime factors by product, the exponents of all prime factors must be even; while the exponents of all prime factors in factoring 1080 = 23 × 33 × 5 are odd, so a must contain prime factors 2, 3 and 5, so the minimum value of a is 2 × 3 × 5 = 30