Least Common Multiple of 90 and 108

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Free LCM Calculator determines the least common multiple (LCM) between 90 and 108 the smallest integer that is 540 that is divisible by both numbers.

Least Common Multiple (LCM) of 90 and 108 is 540.

LCM(90,108) = 540

LCM of 90 and 108

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

LCM of:
and

Least Common Multiple of 90 and 108

LCM of 90 and 108 is 540

Least common multiple can be found by multiplying the highest exponent prime factors of 90 and 108. First we will calculate the prime factors of 90 and 108.

Prime Factorization of 90


2 90
3 45
3 15
5 5
1

Prime factors of 90 are 2, 3,5. Prime factorization of 90 in exponential form is:

90 = 21×32×51

Prime Factorization of 108


2 108
2 54
3 27
3 9
3 3
1

Prime factors of 108 are 2,3. Prime factorization of 108 in exponential form is:

108 = 22×33

Now multiplying the highest exponent prime factors to calculate the LCM of 90 and 108.

LCM(90,108) = 22×33×51
LCM(90,108) = 540

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

Factors of 108

List of positive integer factors of 108 that divides 108 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108

Least Common Multiple of 90 and 108 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 90 and 108, than apply into the LCM equation.

GCF(90,108) = 18
LCM(90,108) = ( 90 × 108) / 18
LCM(90,108) = 9720 / 18
LCM(90,108) = 540

Properties of LCM 90 and 108

(i) The LCM of 108 and 90 is associative

LCM of 90 and 108 = LCM of 108 and 90

Related Least Common Multiples of 90

Related Least Common Multiples of 108

Frequently Asked Questions on LCM of 90 and 108

1. What is the LCM of 90 and 108?

Answer: LCM of 90 and 108 is 540.

2. What are the Factors of 90?

Answer: Factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90. There are 12 integers that are factors of 90. The greatest factor of 90 is 90.

3. What are the Factors of 108?

Answer: Factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108. There are 12 integers that are factors of 108. The greatest factor of 108 is 108.

4. How to Find the LCM of 90 and 108?

Answer:

Least Common Multiple of 90 and 108 = 540

Step 1: Find the prime factorization of 90

90 = 2 x 3 x 3 x 5

Step 2: Find the prime factorization of 108

108 = 2 x 2 x 3 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 = 540 = 2 x 2 x 3 x 3 x 3 x 5

Step 4: Therefore, the least common multiple of 90 and 108 is 540.