What is the Least Common Multiple of 19209 and 19221?

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 19209 and 19221 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19209 and 19221, than apply into the LCM equation.

GCF(19209,19221) = 3
LCM(19209,19221) = ( 19209 × 19221) / 3
LCM(19209,19221) = 369216189 / 3
LCM(19209,19221) = 123072063

Least Common Multiple (LCM) of 19209 and 19221 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19209 and 19221. First we will calculate the prime factors of 19209 and 19221.

Prime Factorization of 19209

Prime Factorization of 19221

Now multiplying the highest exponent prime factors to calculate the LCM of 19209 and 19221.

LCM(19209,19221) = 3¹ × 19¹ × 337¹ × 43¹ × 149¹
LCM(19209,19221) = 123072063