What is the Least Common Multiple of 7209 and 7215?

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 7209 and 7215 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7209 and 7215, than apply into the LCM equation.

GCF(7209,7215) = 3
LCM(7209,7215) = ( 7209 × 7215) / 3
LCM(7209,7215) = 52012935 / 3
LCM(7209,7215) = 17337645

Least Common Multiple (LCM) of 7209 and 7215 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7209 and 7215. First we will calculate the prime factors of 7209 and 7215.

Prime Factorization of 7209

Prime Factorization of 7215

Now multiplying the highest exponent prime factors to calculate the LCM of 7209 and 7215.

LCM(7209,7215) = 3⁴ × 89¹ × 5¹ × 13¹ × 37¹
LCM(7209,7215) = 17337645