What is the Least Common Multiple of 20491 and 20511?

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 20491 and 20511 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20491 and 20511, than apply into the LCM equation.

GCF(20491,20511) = 1
LCM(20491,20511) = ( 20491 × 20511) / 1
LCM(20491,20511) = 420290901 / 1
LCM(20491,20511) = 420290901

Least Common Multiple (LCM) of 20491 and 20511 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20491 and 20511. First we will calculate the prime factors of 20491 and 20511.

Prime Factorization of 20491

Prime Factorization of 20511

Now multiplying the highest exponent prime factors to calculate the LCM of 20491 and 20511.

LCM(20491,20511) = 31¹ × 661¹ × 3² × 43¹ × 53¹
LCM(20491,20511) = 420290901