What is the Least Common Multiple of 21289 and 21307?

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 21289 and 21307 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21289 and 21307, than apply into the LCM equation.

GCF(21289,21307) = 1
LCM(21289,21307) = ( 21289 × 21307) / 1
LCM(21289,21307) = 453604723 / 1
LCM(21289,21307) = 453604723

Least Common Multiple (LCM) of 21289 and 21307 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21289 and 21307. First we will calculate the prime factors of 21289 and 21307.

Prime Factorization of 21289

Prime Factorization of 21307

Now multiplying the highest exponent prime factors to calculate the LCM of 21289 and 21307.

LCM(21289,21307) = 61¹ × 349¹ × 11¹ × 13¹ × 149¹
LCM(21289,21307) = 453604723