Least Common Multiple of 18 and 36

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Free LCM Calculator determines the least common multiple (LCM) between 18 and 36 the smallest integer that is 36 that is divisible by both numbers.

Least Common Multiple (LCM) of 18 and 36 is 36.

LCM(18,36) = 36

LCM of 18 and 36

Least common multiple or lowest common denominator (LCD) can be calculated in three ways;

LCM of:
and

Least Common Multiple of 18 and 36

LCM of 18 and 36 is 36

Least common multiple can be found by multiplying the highest exponent prime factors of 18 and 36. First we will calculate the prime factors of 18 and 36.

Prime Factorization of 18


2 18
3 9
3 3
1

Prime factors of 18 are 2,3. Prime factorization of 18 in exponential form is:

18 = 21×32

Prime Factorization of 36


2 36
2 18
3 9
3 3
1

Prime factors of 36 are 2,3. Prime factorization of 36 in exponential form is:

36 = 22×32

Now multiplying the highest exponent prime factors to calculate the LCM of 18 and 36.

LCM(18,36) = 22×32
LCM(18,36) = 36

Factors of 18

List of positive integer factors of 18 that divides 18 without a remainder.

1, 2, 3, 6, 9, 18

Factors of 36

List of positive integer factors of 36 that divides 36 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 36

Least Common Multiple of 18 and 36 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18 and 36, than apply into the LCM equation.

GCF(18,36) = 18
LCM(18,36) = ( 18 × 36) / 18
LCM(18,36) = 648 / 18
LCM(18,36) = 36

Properties of LCM 18 and 36

(i) The LCM of 36 and 18 is associative

LCM of 18 and 36 = LCM of 36 and 18

Related Least Common Multiples of 18

Related Least Common Multiples of 36

Frequently Asked Questions on LCM of 18 and 36

1. What is the LCM of 18 and 36?

Answer: LCM of 18 and 36 is 36.

2. What are the Factors of 18?

Answer: Factors of 18 are 1, 2, 3, 6, 9, 18. There are 6 integers that are factors of 18. The greatest factor of 18 is 18.

3. What are the Factors of 36?

Answer: Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36. There are 9 integers that are factors of 36. The greatest factor of 36 is 36.

4. How to Find the LCM of 18 and 36?

Answer:

Least Common Multiple of 18 and 36 = 36

Step 1: Find the prime factorization of 18

18 = 2 x 3 x 3

Step 2: Find the prime factorization of 36

36 = 2 x 2 x 3 x 3

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 36 = 2 x 2 x 3 x 3

Step 4: Therefore, the least common multiple of 18 and 36 is 36.