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What is the Least Common Multiple of 4 and 24?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least common multiple (LCM) of 4 and 24 is 24.

LCM(4,24) = 24

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Least Common Multiple of 4 and 24 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 4 and 24, than apply into the LCM equation.

GCF(4,24) = 4
LCM(4,24) = ( 4 × 24) / 4
LCM(4,24) = 96 / 4
LCM(4,24) = 24

Least Common Multiple (LCM) of 4 and 24 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 4 and 24. First we will calculate the prime factors of 4 and 24.

Prime Factorization of 4

Prime factors of 4 are 2. Prime factorization of 4 in exponential form is:

4 = 22

Prime Factorization of 24

Prime factors of 24 are 2, 3. Prime factorization of 24 in exponential form is:

24 = 23 × 31

Now multiplying the highest exponent prime factors to calculate the LCM of 4 and 24.

LCM(4,24) = 23 × 31
LCM(4,24) = 24

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