What is the Least Common Multiple of 5640 and 5645?

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 5640 and 5645 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 5640 and 5645, than apply into the LCM equation.

GCF(5640,5645) = 5
LCM(5640,5645) = ( 5640 × 5645) / 5
LCM(5640,5645) = 31837800 / 5
LCM(5640,5645) = 6367560

Least Common Multiple (LCM) of 5640 and 5645 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 5640 and 5645. First we will calculate the prime factors of 5640 and 5645.

Prime Factorization of 5640

Prime Factorization of 5645

Now multiplying the highest exponent prime factors to calculate the LCM of 5640 and 5645.

LCM(5640,5645) = 2³ × 3¹ × 5¹ × 47¹ × 1129¹
LCM(5640,5645) = 6367560