What is the Least Common Multiple of 84420 and 84428?

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 84420 and 84428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 84420 and 84428, than apply into the LCM equation.

GCF(84420,84428) = 4
LCM(84420,84428) = ( 84420 × 84428) / 4
LCM(84420,84428) = 7127411760 / 4
LCM(84420,84428) = 1781852940

Least Common Multiple (LCM) of 84420 and 84428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 84420 and 84428. First we will calculate the prime factors of 84420 and 84428.

Prime Factorization of 84420

Prime Factorization of 84428

Now multiplying the highest exponent prime factors to calculate the LCM of 84420 and 84428.

LCM(84420,84428) = 2² × 3² × 5¹ × 7¹ × 67¹ × 21107¹
LCM(84420,84428) = 1781852940