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Least Common Multiple of 5 and 8

Free LCM Calculator determines the least common multiple (LCM) between 5 and 8 the smallest integer that is 40 that is divisible by both numbers.

Least Common Multiple (LCM) of 5 and 8 is 40.

LCM(5,8) = 40

LCM of 5 and 8

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

LCM of:
and

Least Common Multiple (LCM) of 8 and 5 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 8 and 5. First we will calculate the prime factors of 8 and 5.

Prime Factorization of 8


2 8
2 4
2 2
1

Prime factors of 8 are 2. Prime factorization of 8 in exponential form is:

8 = 23

Prime Factorization of 5


5 5
1

Prime factors of 5 are 5. Prime factorization of 5 in exponential form is:

5 = 51

Now multiplying the highest exponent prime factors to calculate the LCM of 8 and 5.

LCM(8,5) = 23×51
LCM(8,5) = 40

Factors of 8

List of positive integer factors of 8 that divides 8 without a remainder.

1, 2, 4, 8

Factors of 5

List of positive integer factors of 5 that divides 5 without a remainder.

1, 5

Least Common Multiple of 8 and 5 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8 and 5, than apply into the LCM equation.

GCF(8,5) = 1
LCM(8,5) = ( 8 × 5) / 1
LCM(8,5) = 40 / 1
LCM(8,5) = 40

Properties of LCM 8 and 5

(i) The LCM of 5 and 8 is associative

LCM of 8 and 5 = LCM of 5 and 8

Frequently Asked Questions on LCM of 8 and 5

1. What is the LCM of 8 and 5?

Answer: LCM of 8 and 5 is 40.

2. What are the Factors of 8?

Answer: Factors of 8 are 1, 2, 4, 8. There are 4 integers that are factors of 8. The greatest factor of 8 is 8.

3. What are the Factors of 5?

Answer: Factors of 5 are 1, 5. There are 2 integers that are factors of 5. The greatest factor of 5 is 5.

4. How to Find the LCM of 8 and 5?

Answer:

Least Common Multiple of 8 and 5 = 40

Step 1: Find the prime factorization of 8

8 = 2 x 2 x 2

Step 2: Find the prime factorization of 5

5 = 5

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

LCM = 40 = 2 x 2 x 2 x 5

Step 4: Therefore, the least common multiple of 8 and 5 is 40.