What is the Least Common Multiple of 20665 and 20670?

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 20665 and 20670 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20665 and 20670, than apply into the LCM equation.

GCF(20665,20670) = 5
LCM(20665,20670) = ( 20665 × 20670) / 5
LCM(20665,20670) = 427145550 / 5
LCM(20665,20670) = 85429110

Least Common Multiple (LCM) of 20665 and 20670 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20665 and 20670. First we will calculate the prime factors of 20665 and 20670.

Prime Factorization of 20665

Prime Factorization of 20670

Now multiplying the highest exponent prime factors to calculate the LCM of 20665 and 20670.

LCM(20665,20670) = 5¹ × 4133¹ × 2¹ × 3¹ × 13¹ × 53¹
LCM(20665,20670) = 85429110