Prime Factorization of 81

What is the Prime Factorization of 81?

Answer: Prime Factors of 81: 3, 3, 3, 3

or

34

Explanation of number 81 Prime Factorization

Prime Factorization of 81 it is expressing 81 as the product of prime factors. In other words it is finding which prime numbers should be multiplied together to make 81.

Since number 81 is a Composite number (not Prime) we can do its Prime Factorization.

To get a list of all Prime Factors of 81, we have to iteratively divide 81 by the smallest prime number possible until the result equals 1.

Here is the complete solution of finding Prime Factors of 81:

The smallest Prime Number which can divide 81 without a remainder is 3. So the first calculation step would look like:

81 ÷ 3 = 27

Now we repeat this action until the result equals 1:

27 ÷ 3 = 9

9 ÷ 3 = 3

3 ÷ 3 = 1

Now we have all the Prime Factors for number 81. It is: 3, 3, 3, 3

Or you may also write it in exponential form: 34

Prime Factor Tree of 81

We may also express the prime factorization of 81 as a Factor Tree:

See Also

About "Prime Factorization" Calculator

This calculator will perform a Prime Factorization of any given number and will show all its Prime Factors. For example, it can help you find out what is the Prime Factorization of 81? (The answer is: 3, 3, 3, 3). Pick the number for factorization (e.g. '81'). After that hit the 'Calculate' button.
Prime factors are the positive integers having only two factors - 1 and the number itself

Prime Factorization Table

NumberPrime Factors
2, 3, 11
67
22 × 17
3, 23
2, 5, 7
71
23 × 32
73
2, 37
3 × 52
22 × 19
7, 11
2, 3, 13
79
24 × 5
34
2, 41
83
22 × 3 × 7
5, 17
2, 43
3, 29
23 × 11
89
2 × 32 × 5
7, 13
22 × 23
3, 31
2, 47
5, 19

FAQ

What is the Prime Factorization of 81?

Prime Factors of 81: 3, 3, 3, 3

How many prime factors does 81 have?

Number 81 has 4 Prime Factors

What is the Prime Factorization of 81 in exponential form?

The Prime Factorization of the number 81 in the exponential form is: 34