What is the Least Common Multiple of 10640 and 10660?

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 10660 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 10660, than apply into the LCM equation.

GCF(10640,10660) = 20
LCM(10640,10660) = ( 10640 × 10660) / 20
LCM(10640,10660) = 113422400 / 20
LCM(10640,10660) = 5671120

Least Common Multiple (LCM) of 10640 and 10660 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 10640 and 10660. First we will calculate the prime factors of 10640 and 10660.

Prime Factorization of 10640

Prime Factorization of 10660

Now multiplying the highest exponent prime factors to calculate the LCM of 10640 and 10660.

LCM(10640,10660) = 2⁴ × 5¹ × 7¹ × 19¹ × 13¹ × 41¹
LCM(10640,10660) = 5671120