What is the Least Common Multiple of 72420 and 72424?

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 of 72420 and 72424 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 72420 and 72424, than apply into the LCM equation.

GCF(72420,72424) = 4
LCM(72420,72424) = ( 72420 × 72424) / 4
LCM(72420,72424) = 5244946080 / 4
LCM(72420,72424) = 1311236520

Least Common Multiple (LCM) of 72420 and 72424 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72420 and 72424. First we will calculate the prime factors of 72420 and 72424.

Prime Factorization of 72420

Prime Factorization of 72424

Now multiplying the highest exponent prime factors to calculate the LCM of 72420 and 72424.

LCM(72420,72424) = 2³ × 3¹ × 5¹ × 17¹ × 71¹ × 11¹ × 823¹
LCM(72420,72424) = 1311236520