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What is the Least Common Multiple of 18704 and 18720?

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 18704 and 18720 is 21883680.

LCM(18704,18720) = 21883680

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Least Common Multiple of 18704 and 18720 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18704 and 18720, than apply into the LCM equation.

GCF(18704,18720) = 16
LCM(18704,18720) = ( 18704 × 18720) / 16
LCM(18704,18720) = 350138880 / 16
LCM(18704,18720) = 21883680

Least Common Multiple (LCM) of 18704 and 18720 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 18704 and 18720. First we will calculate the prime factors of 18704 and 18720.

Prime Factorization of 18704

Prime factors of 18704 are 2, 7, 167. Prime factorization of 18704 in exponential form is:

18704 = 24 × 71 × 1671

Prime Factorization of 18720

Prime factors of 18720 are 2, 3, 5, 13. Prime factorization of 18720 in exponential form is:

18720 = 25 × 32 × 51 × 131

Now multiplying the highest exponent prime factors to calculate the LCM of 18704 and 18720.

LCM(18704,18720) = 25 × 71 × 1671 × 32 × 51 × 131
LCM(18704,18720) = 21883680