The product of an integer a and 180 is a square number. When a is the smallest, what is the square number

The product of an integer a and 180 is a square number. When a is the smallest, what is the square number

1023728481,
Because: 180 = 36 × 5 = 6 & # 178; × 5
So: when the product of a and 180 is a square number, the minimum of a is 5