What is the Least Common Multiple of 20740 and 20760?

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 20740 and 20760 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20740 and 20760, than apply into the LCM equation.

GCF(20740,20760) = 20
LCM(20740,20760) = ( 20740 × 20760) / 20
LCM(20740,20760) = 430562400 / 20
LCM(20740,20760) = 21528120

Least Common Multiple (LCM) of 20740 and 20760 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20740 and 20760. First we will calculate the prime factors of 20740 and 20760.

Prime Factorization of 20740

Prime Factorization of 20760

Now multiplying the highest exponent prime factors to calculate the LCM of 20740 and 20760.

LCM(20740,20760) = 2³ × 5¹ × 17¹ × 61¹ × 3¹ × 173¹
LCM(20740,20760) = 21528120