What is the Least Common Multiple of 69120 and 69140?

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 69120 and 69140 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 69120 and 69140, than apply into the LCM equation.

GCF(69120,69140) = 20
LCM(69120,69140) = ( 69120 × 69140) / 20
LCM(69120,69140) = 4778956800 / 20
LCM(69120,69140) = 238947840

Least Common Multiple (LCM) of 69120 and 69140 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 69120 and 69140. First we will calculate the prime factors of 69120 and 69140.

Prime Factorization of 69120

Prime Factorization of 69140

Now multiplying the highest exponent prime factors to calculate the LCM of 69120 and 69140.

LCM(69120,69140) = 2⁹ × 3³ × 5¹ × 3457¹
LCM(69120,69140) = 238947840