What is the Least Common Multiple of 10640 and 10647?

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 10647 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 10647, than apply into the LCM equation.

GCF(10640,10647) = 7
LCM(10640,10647) = ( 10640 × 10647) / 7
LCM(10640,10647) = 113284080 / 7
LCM(10640,10647) = 16183440

Least Common Multiple (LCM) of 10640 and 10647 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 10640 and 10647. First we will calculate the prime factors of 10640 and 10647.

Prime Factorization of 10640

Prime Factorization of 10647

Now multiplying the highest exponent prime factors to calculate the LCM of 10640 and 10647.

LCM(10640,10647) = 2⁴ × 5¹ × 7¹ × 19¹ × 3² × 13²
LCM(10640,10647) = 16183440