81 Prime Factorization

81 prime factorization provides more information on if 81 is a prime number, what are all the prime factors of 81. The given integer 81 is a composite number since it has more factors than 1 and the number itself. In other words, 81 is divisible by more factors than 1 and the number itself.

Prime factors of 81
81 = (?)
81 = 3 x 3 x 3 x 3

Hence,
{3, 3, 3, 3} are the prime factors of 81.
The product of factors {3, 3, 3, 3} form the given positive integer 81.