What is the Least Common Multiple of 2208 and 2220?

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 2208 and 2220 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2208 and 2220, than apply into the LCM equation.

GCF(2208,2220) = 12
LCM(2208,2220) = ( 2208 × 2220) / 12
LCM(2208,2220) = 4901760 / 12
LCM(2208,2220) = 408480

Least Common Multiple (LCM) of 2208 and 2220 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 2208 and 2220. First we will calculate the prime factors of 2208 and 2220.

Prime Factorization of 2208

Prime Factorization of 2220

Now multiplying the highest exponent prime factors to calculate the LCM of 2208 and 2220.

LCM(2208,2220) = 2⁵ × 3¹ × 23¹ × 5¹ × 37¹
LCM(2208,2220) = 408480