## # Factors of 81 (More Math Tools) Factors of 81 Number Factors: 1, 3, 9, 27, 81 Factors of 81 in Pairs: (1 x 81) (3 x 27) (9 x 9) (27 x 3) (81 x 1) Prime Factors of 81 : 3 * 3 * 3 * 3

### List of the Factors of 81

This list was generated by our Factor Calculator. It provides a list of the factors of 81 - eg, the definitive answer to 81. This could also be described as the divisors of 81.

### What are the factors of 81?

These are the integers which can be evenly divided into 81; they can be expressed as either individual factors or as factor pairs. In this case, we present them both ways.

### What is the prime factorization of 81?

A prime factorization is the result of factoring a number into a set of components which are all prime numbers. This is generally written by showing 81 as a product of its prime factors. For 81, this result would be:

81 = 3 x 3 x 3 x 3

### Is 81 a composite number?

Yes! 81 is a composite number. It is the product of two positive numbers other than 1 and itself.

### Is 81 a square number?

Yes! 81 is a square. Its square root is an integer, specifically 9.

### How many factors does 81 have?

This number has 5 factors: 1, 3, 9, 27, 81

More specifically, shown as pairs...

(1*81) (3*27) (9*9) (27*3) (81*1)

### Factors of Other Numbers

#### Next Several Numbers

content: factors of 81