What is the Least Common Multiple of 10640 and 10655?

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 10640 and 10655 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 10640 and 10655, than apply into the LCM equation.

GCF(10640,10655) = 5
LCM(10640,10655) = ( 10640 × 10655) / 5
LCM(10640,10655) = 113369200 / 5
LCM(10640,10655) = 22673840

Least Common Multiple (LCM) of 10640 and 10655 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 10640 and 10655. First we will calculate the prime factors of 10640 and 10655.

Prime Factorization of 10640

Prime Factorization of 10655

Now multiplying the highest exponent prime factors to calculate the LCM of 10640 and 10655.

LCM(10640,10655) = 2⁴ × 5¹ × 7¹ × 19¹ × 2131¹
LCM(10640,10655) = 22673840