What is the Least Common Multiple of 16420 and 16428?

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 16420 and 16428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 16420 and 16428, than apply into the LCM equation.

GCF(16420,16428) = 4
LCM(16420,16428) = ( 16420 × 16428) / 4
LCM(16420,16428) = 269747760 / 4
LCM(16420,16428) = 67436940

Least Common Multiple (LCM) of 16420 and 16428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 16420 and 16428. First we will calculate the prime factors of 16420 and 16428.

Prime Factorization of 16420

Prime Factorization of 16428

Now multiplying the highest exponent prime factors to calculate the LCM of 16420 and 16428.

LCM(16420,16428) = 2² × 5¹ × 821¹ × 3¹ × 37²
LCM(16420,16428) = 67436940