What is the Least Common Multiple of 20551 and 20561?

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 20551 and 20561 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20551 and 20561, than apply into the LCM equation.

GCF(20551,20561) = 1
LCM(20551,20561) = ( 20551 × 20561) / 1
LCM(20551,20561) = 422549111 / 1
LCM(20551,20561) = 422549111

Least Common Multiple (LCM) of 20551 and 20561 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20551 and 20561. First we will calculate the prime factors of 20551 and 20561.

Prime Factorization of 20551

Prime Factorization of 20561

Now multiplying the highest exponent prime factors to calculate the LCM of 20551 and 20561.

LCM(20551,20561) = 20551¹ × 29¹ × 709¹
LCM(20551,20561) = 422549111