What is the Least Common Multiple of 21108 and 21121?

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 21108 and 21121 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21108 and 21121, than apply into the LCM equation.

GCF(21108,21121) = 1
LCM(21108,21121) = ( 21108 × 21121) / 1
LCM(21108,21121) = 445822068 / 1
LCM(21108,21121) = 445822068

Least Common Multiple (LCM) of 21108 and 21121 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21108 and 21121. First we will calculate the prime factors of 21108 and 21121.

Prime Factorization of 21108

Prime Factorization of 21121

Now multiplying the highest exponent prime factors to calculate the LCM of 21108 and 21121.

LCM(21108,21121) = 2² × 3¹ × 1759¹ × 21121¹
LCM(21108,21121) = 445822068