What is the Least Common Multiple of 21315 and 21325?

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 21315 and 21325 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21315 and 21325, than apply into the LCM equation.

GCF(21315,21325) = 5
LCM(21315,21325) = ( 21315 × 21325) / 5
LCM(21315,21325) = 454542375 / 5
LCM(21315,21325) = 90908475

Least Common Multiple (LCM) of 21315 and 21325 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21315 and 21325. First we will calculate the prime factors of 21315 and 21325.

Prime Factorization of 21315

Prime Factorization of 21325

Now multiplying the highest exponent prime factors to calculate the LCM of 21315 and 21325.

LCM(21315,21325) = 3¹ × 5² × 7² × 29¹ × 853¹
LCM(21315,21325) = 90908475