What is the Least Common Multiple of 220 and 224?

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 220 and 224 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 220 and 224, than apply into the LCM equation.

GCF(220,224) = 4
LCM(220,224) = ( 220 × 224) / 4
LCM(220,224) = 49280 / 4
LCM(220,224) = 12320

Least Common Multiple (LCM) of 220 and 224 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 220 and 224. First we will calculate the prime factors of 220 and 224.

Prime Factorization of 220

Prime Factorization of 224

Now multiplying the highest exponent prime factors to calculate the LCM of 220 and 224.

LCM(220,224) = 2⁵ × 5¹ × 11¹ × 7¹
LCM(220,224) = 12320