How many divisors of 7200 are perfect squares (count 1 as well)?

7200 = $2^5\times 3^2\times 5^2$. A square divisor uses even exponents only: 2 has choices 0, 2, 4 (3 ways), 3 has 0, 2 (2 ways), 5 has 0, 2 (2 ways). Total $3\times 2\times 2=12$.