What is the Least Common Multiple of 72168 and 72172?

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 72168 and 72172 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 72168 and 72172, than apply into the LCM equation.

GCF(72168,72172) = 4
LCM(72168,72172) = ( 72168 × 72172) / 4
LCM(72168,72172) = 5208508896 / 4
LCM(72168,72172) = 1302127224

Least Common Multiple (LCM) of 72168 and 72172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72168 and 72172. First we will calculate the prime factors of 72168 and 72172.

Prime Factorization of 72168

Prime Factorization of 72172

Now multiplying the highest exponent prime factors to calculate the LCM of 72168 and 72172.

LCM(72168,72172) = 2³ × 3¹ × 31¹ × 97¹ × 18043¹
LCM(72168,72172) = 1302127224