Question: is 2 a factor of 36?
Answer: Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36. Prime factorization: 36 = 2 x 2 x 3 x 3, which can also be written 36 = 2² x 3². Since √36 = 6, a whole number, 36 is a perfect square.