What is the Least Common Multiple of 20669 and 20680?

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 20669 and 20680 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20669 and 20680, than apply into the LCM equation.

GCF(20669,20680) = 11
LCM(20669,20680) = ( 20669 × 20680) / 11
LCM(20669,20680) = 427434920 / 11
LCM(20669,20680) = 38857720

Least Common Multiple (LCM) of 20669 and 20680 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20669 and 20680. First we will calculate the prime factors of 20669 and 20680.

Prime Factorization of 20669

Prime Factorization of 20680

Now multiplying the highest exponent prime factors to calculate the LCM of 20669 and 20680.

LCM(20669,20680) = 11¹ × 1879¹ × 2³ × 5¹ × 47¹
LCM(20669,20680) = 38857720