What are all the factors, the prime factorization, and factor pairs of 3?

To find the factors of 3, divide 3 by each number starting with 1 and working up to 3

Now let us find how to calculate all the factors of 3:
As you can see, the factors of 3 are:
1, 3

Factors of Numbers similar to 3

Introduction to Factors

Factors are building blocks of numbers that, when multiplied together, reproduce the original number. In the case of the number 3, factors are particularly straightforward due to its prime nature. Understanding these factors illuminates the structure and inherent properties of 3 within the expansive world of mathematics.

What are Factors of 3?

Factors of 3 are the whole numbers that divide 3 without leaving any remainder. Since 3 is a prime number, it has a very concise list of factors, which are 1 and 3 itself. These factors showcase a fundamental quality of prime numbers: having no divisors other than one and the number itself. Below is a list demonstrating the factor pairing for the number 3:

  • 1 × 3 = 3

How to Find the Factors of 3?

Finding the factors of 3 is a simple process, given its status as a prime number. The procedure involves dividing 3 by integers to identify factors. You would start with 1, which is a factor of all natural numbers and proceed to 3, being a factor of itself. These few steps yield the factors:

  • 3 ÷ 1 = 3
  • 3 ÷ 3 = 1

Apart from these, any other division would result in a non-whole number, which cannot be a factor. For instance:

  • 3 ÷ 2 = 1.5

Thus, the complete list of factors for the number 3 includes only 1 and 3.

Pair Factors of 3

Due to the nature of 3 being a prime number, its pair factors are limited to the product of the number and 1. The concept of pair factors examines sets of two numbers that yield the original number when multiplied together. For 3, the pair factors can be summarized as follows:

Positive Pair Factor Product Resulting in 3
(1, 3) 1 × 3

Similarly, we can define the negative pair factor as a product of two negative numbers that give positive 3:

Negative Pair Factor Product Resulting in 3
(-1, -3) -1 × -3

Prime Factorization of 3

Prime factorization is the breakdown of a number into the set of prime numbers that, when multiplied together, result in the original number. For 3, the prime factorization is simply 3 itself, as it cannot be broken down into other prime numbers. A factor tree diagram for 3 would consist of a single branch:

  • 3 (prime number)

Important Points to Remember

In summary, the factors of 3 are few but significant. Here are some key points:

  • The total count of factors for the number 3 is two: 1 and 3.
  • The only prime factor of 3 is 3 itself.
  • The pair factors of 3 are (1, 3) and (-1, -3).
  • The sum of the factors of 3 is 4 (1+3).
  • Understanding factors can provide deeper insights into number properties and is crucial for various mathematical applications.


  1. Is there another positive whole number other than 1 and 3 that is a factor of 3?
  2. Can 3 be expressed as a product of any other prime numbers besides 3 itself?

Solutions to Exercises

  1. No, there are no other positive whole numbers that are factors of 3 besides 1 and 3.
  2. No, 3 cannot be expressed as a product of any other prime numbers; 3 is a prime number itself.

Frequently Asked Questions

What are the factors of 3?

The factors of 3 are 1 and 3.

Are there any negative factors of 3?

Yes, the negative factors of 3 are -1 and -3.

Is 3 a composite number?

No, 3 is not a composite number; it is a prime number.

Other conversions of the number 3