What is the Least Common Multiple of 42021 and 42028?

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 42021 and 42028 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42021 and 42028, than apply into the LCM equation.

GCF(42021,42028) = 7
LCM(42021,42028) = ( 42021 × 42028) / 7
LCM(42021,42028) = 1766058588 / 7
LCM(42021,42028) = 252294084

Least Common Multiple (LCM) of 42021 and 42028 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42021 and 42028. First we will calculate the prime factors of 42021 and 42028.

Prime Factorization of 42021

Prime Factorization of 42028

Now multiplying the highest exponent prime factors to calculate the LCM of 42021 and 42028.

LCM(42021,42028) = 3² × 7¹ × 23¹ × 29¹ × 2² × 19¹ × 79¹
LCM(42021,42028) = 252294084