What is the Least Common Multiple of 67420 and 67428?

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 67420 and 67428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 67420 and 67428, than apply into the LCM equation.

GCF(67420,67428) = 4
LCM(67420,67428) = ( 67420 × 67428) / 4
LCM(67420,67428) = 4545995760 / 4
LCM(67420,67428) = 1136498940

Least Common Multiple (LCM) of 67420 and 67428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 67420 and 67428. First we will calculate the prime factors of 67420 and 67428.

Prime Factorization of 67420

Prime Factorization of 67428

Now multiplying the highest exponent prime factors to calculate the LCM of 67420 and 67428.

LCM(67420,67428) = 2² × 5¹ × 3371¹ × 3² × 1873¹
LCM(67420,67428) = 1136498940