What is the Least Common Multiple of 21021 and 21039?

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 21021 and 21039 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21021 and 21039, than apply into the LCM equation.

GCF(21021,21039) = 3
LCM(21021,21039) = ( 21021 × 21039) / 3
LCM(21021,21039) = 442260819 / 3
LCM(21021,21039) = 147420273

Least Common Multiple (LCM) of 21021 and 21039 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21021 and 21039. First we will calculate the prime factors of 21021 and 21039.

Prime Factorization of 21021

Prime Factorization of 21039

Now multiplying the highest exponent prime factors to calculate the LCM of 21021 and 21039.

LCM(21021,21039) = 3¹ × 7² × 11¹ × 13¹ × 7013¹
LCM(21021,21039) = 147420273