What is the Least Common Multiple of 76420 and 76438?

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 76420 and 76438 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 76420 and 76438, than apply into the LCM equation.

GCF(76420,76438) = 2
LCM(76420,76438) = ( 76420 × 76438) / 2
LCM(76420,76438) = 5841391960 / 2
LCM(76420,76438) = 2920695980

Least Common Multiple (LCM) of 76420 and 76438 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 76420 and 76438. First we will calculate the prime factors of 76420 and 76438.

Prime Factorization of 76420

Prime Factorization of 76438

Now multiplying the highest exponent prime factors to calculate the LCM of 76420 and 76438.

LCM(76420,76438) = 2² × 5¹ × 3821¹ × 38219¹
LCM(76420,76438) = 2920695980