Factors Of 18

Factors of 18 are the numbers which give the original number 18 when multiplied together in pairs. Basically, these are the numbers which divide the original number completely. We can also evaluate the factors of 24, 12, 45, 8, 9, etc. by the means multiplication method. We can also call them as multiplication factors. 18 is the composite number and have prime factors. We will find the prime factorisation of 18 with the help of the division method. Let us learn to find factors of a number 18 in a very simple and easy method.

Factors of 18

Factors of 18 in Pairs

We can find the factor in pairs, by multiplying two numbers in a combination to get the result as 18. Let’s get started;

1 × 18 = 18

2 × 9 = 18

3 × 6 = 18

 

Factors Of 18
1, 2, 3, 6, 9 and 18

Prime Factorisation of 18

The number 18 is a composite number. Now let us find the prime factors of it.

  • The first step is to divide the number 18 with the smallest prime factor,i.e. 2.

18 ÷ 2 = 9

  • Now, check whether 9 can be further divided by 2 or not.

9 ÷ 2 = 4.5

          It gives fraction value. But the factors should be a whole number.

Therefore, we will move to the next prime number, i.e. 3.

  • Now, divide 9 by 3.

9 ÷ 3 = 3

  • Again divide 3 by 3.

3 ÷ 3 = 1

  • We have received 1 at the end and further, we cannot proceed with the division method. So, the prime factors of 18 are 2 × 3 × 3 or we can also write them as 2 × 32, where 2 and 3 both are prime numbers.

Learn the factorization of more numbers here with us in BYJU’S and also download BYJU’S – The Learning App for a better experience.

Leave a Comment

Your email address will not be published. Required fields are marked *