What is the Least Common Multiple of 74420 and 74428?

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 74420 and 74428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 74420 and 74428, than apply into the LCM equation.

GCF(74420,74428) = 4
LCM(74420,74428) = ( 74420 × 74428) / 4
LCM(74420,74428) = 5538931760 / 4
LCM(74420,74428) = 1384732940

Least Common Multiple (LCM) of 74420 and 74428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 74420 and 74428. First we will calculate the prime factors of 74420 and 74428.

Prime Factorization of 74420

Prime Factorization of 74428

Now multiplying the highest exponent prime factors to calculate the LCM of 74420 and 74428.

LCM(74420,74428) = 2² × 5¹ × 61² × 23¹ × 809¹
LCM(74420,74428) = 1384732940