What is the Least Common Multiple of 21189 and 21207?

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 21189 and 21207 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21189 and 21207, than apply into the LCM equation.

GCF(21189,21207) = 3
LCM(21189,21207) = ( 21189 × 21207) / 3
LCM(21189,21207) = 449355123 / 3
LCM(21189,21207) = 149785041

Least Common Multiple (LCM) of 21189 and 21207 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21189 and 21207. First we will calculate the prime factors of 21189 and 21207.

Prime Factorization of 21189

Prime Factorization of 21207

Now multiplying the highest exponent prime factors to calculate the LCM of 21189 and 21207.

LCM(21189,21207) = 3¹ × 7¹ × 1009¹ × 7069¹
LCM(21189,21207) = 149785041