What is the Least Common Multiple of 12240 and 12245?

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 12240 and 12245 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12240 and 12245, than apply into the LCM equation.

GCF(12240,12245) = 5
LCM(12240,12245) = ( 12240 × 12245) / 5
LCM(12240,12245) = 149878800 / 5
LCM(12240,12245) = 29975760

Least Common Multiple (LCM) of 12240 and 12245 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12240 and 12245. First we will calculate the prime factors of 12240 and 12245.

Prime Factorization of 12240

Prime Factorization of 12245

Now multiplying the highest exponent prime factors to calculate the LCM of 12240 and 12245.

LCM(12240,12245) = 2⁴ × 3² × 5¹ × 17¹ × 31¹ × 79¹
LCM(12240,12245) = 29975760