What is the Least Common Multiple of 21921 and 21939?

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 21921 and 21939 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21921 and 21939, than apply into the LCM equation.

GCF(21921,21939) = 3
LCM(21921,21939) = ( 21921 × 21939) / 3
LCM(21921,21939) = 480924819 / 3
LCM(21921,21939) = 160308273

Least Common Multiple (LCM) of 21921 and 21939 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21921 and 21939. First we will calculate the prime factors of 21921 and 21939.

Prime Factorization of 21921

Prime Factorization of 21939

Now multiplying the highest exponent prime factors to calculate the LCM of 21921 and 21939.

LCM(21921,21939) = 3¹ × 7307¹ × 71¹ × 103¹
LCM(21921,21939) = 160308273