What is the Least Common Multiple of 21220 and 21239?

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 21220 and 21239 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21220 and 21239, than apply into the LCM equation.

GCF(21220,21239) = 1
LCM(21220,21239) = ( 21220 × 21239) / 1
LCM(21220,21239) = 450691580 / 1
LCM(21220,21239) = 450691580

Least Common Multiple (LCM) of 21220 and 21239 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21220 and 21239. First we will calculate the prime factors of 21220 and 21239.

Prime Factorization of 21220

Prime Factorization of 21239

Now multiplying the highest exponent prime factors to calculate the LCM of 21220 and 21239.

LCM(21220,21239) = 2² × 5¹ × 1061¹ × 67¹ × 317¹
LCM(21220,21239) = 450691580