What is the Least Common Multiple of 28158 and 28172?

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 28158 and 28172 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 28158 and 28172, than apply into the LCM equation.

GCF(28158,28172) = 2
LCM(28158,28172) = ( 28158 × 28172) / 2
LCM(28158,28172) = 793267176 / 2
LCM(28158,28172) = 396633588

Least Common Multiple (LCM) of 28158 and 28172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 28158 and 28172. First we will calculate the prime factors of 28158 and 28172.

Prime Factorization of 28158

Prime Factorization of 28172

Now multiplying the highest exponent prime factors to calculate the LCM of 28158 and 28172.

LCM(28158,28172) = 2² × 3¹ × 13¹ × 19² × 7043¹
LCM(28158,28172) = 396633588