What is the Least Common Multiple of 72156 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 72156 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 72156 and 72172, than apply into the LCM equation.

GCF(72156,72172) = 4
LCM(72156,72172) = ( 72156 × 72172) / 4
LCM(72156,72172) = 5207642832 / 4
LCM(72156,72172) = 1301910708

Least Common Multiple (LCM) of 72156 and 72172 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 72156 and 72172. First we will calculate the prime factors of 72156 and 72172.

Prime Factorization of 72156

Prime Factorization of 72172

Now multiplying the highest exponent prime factors to calculate the LCM of 72156 and 72172.

LCM(72156,72172) = 2² × 3¹ × 7¹ × 859¹ × 18043¹
LCM(72156,72172) = 1301910708