What is the Least Common Multiple of 19940 and 19947?

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 19940 and 19947 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19940 and 19947, than apply into the LCM equation.

GCF(19940,19947) = 1
LCM(19940,19947) = ( 19940 × 19947) / 1
LCM(19940,19947) = 397743180 / 1
LCM(19940,19947) = 397743180

Least Common Multiple (LCM) of 19940 and 19947 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19940 and 19947. First we will calculate the prime factors of 19940 and 19947.

Prime Factorization of 19940

Prime Factorization of 19947

Now multiplying the highest exponent prime factors to calculate the LCM of 19940 and 19947.

LCM(19940,19947) = 2² × 5¹ × 997¹ × 3¹ × 61¹ × 109¹
LCM(19940,19947) = 397743180