What is the Least Common Multiple of 77420 and 77428?

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 77420 and 77428 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 77420 and 77428, than apply into the LCM equation.

GCF(77420,77428) = 4
LCM(77420,77428) = ( 77420 × 77428) / 4
LCM(77420,77428) = 5994475760 / 4
LCM(77420,77428) = 1498618940

Least Common Multiple (LCM) of 77420 and 77428 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 77420 and 77428. First we will calculate the prime factors of 77420 and 77428.

Prime Factorization of 77420

Prime Factorization of 77428

Now multiplying the highest exponent prime factors to calculate the LCM of 77420 and 77428.

LCM(77420,77428) = 2² × 5¹ × 7² × 79¹ × 13¹ × 1489¹
LCM(77420,77428) = 1498618940