Q:

# What are the prime factors of 81?

A:

The prime factor of 81 is 3^4. A prime number is a number greater than one that is evenly divisible only by itself and one. A composite number, such as 81, is a number that has factors other than itself and one.

Know More

## Keep Learning

Credit: Getty Images Europe Getty Images News Getty Images

To find the prime factorization of 81, take two numbers that multiply together to make 81, such as 9 x 9. Nine is a composite number that is further broken down into 3 x 3. Break down both nines in this manner. Three is a prime number, so the prime factorization of 81 is 3 x 3 x 3 x 3, or 3^4.

Sources:

## Related Questions

• A:

The prime factors of 6 are 2 and 3. The number 6 cannot be factorized into any other combination of prime numbers. A prime number is a whole number larger than 1 which can only be divided by 1 and itself.

Filed Under:
• A:

The prime factors of 22 are 2 and 11. Prime factors of a number are composed of prime numbers that when multiplied together form the number.

Filed Under:
• A:

The prime factors of 40 are 2 x 2 x 2 x 5. Prime factors are prime numbers, which are only divisible by 1 and themselves. The only even prime number is 2, and it is a factor of all even numbers.

Filed Under:
• A:

The prime factors of 64 are 2 x 2 x 2 x 2 x 2 x 2, which can also be written as 26. Prime factors are the prime numbers that are multiplied together to result in the product. To break down a product into its factors is known as "factoring a number."