What is the Least Common Multiple of 42156 and 42168?

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 42156 and 42168 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 42156 and 42168, than apply into the LCM equation.

GCF(42156,42168) = 12
LCM(42156,42168) = ( 42156 × 42168) / 12
LCM(42156,42168) = 1777634208 / 12
LCM(42156,42168) = 148136184

Least Common Multiple (LCM) of 42156 and 42168 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 42156 and 42168. First we will calculate the prime factors of 42156 and 42168.

Prime Factorization of 42156

Prime Factorization of 42168

Now multiplying the highest exponent prime factors to calculate the LCM of 42156 and 42168.

LCM(42156,42168) = 2³ × 3² × 1171¹ × 7¹ × 251¹
LCM(42156,42168) = 148136184