What is the Least Common Multiple of 19689 and 19698?

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 19689 and 19698 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19689 and 19698, than apply into the LCM equation.

GCF(19689,19698) = 3
LCM(19689,19698) = ( 19689 × 19698) / 3
LCM(19689,19698) = 387833922 / 3
LCM(19689,19698) = 129277974

Least Common Multiple (LCM) of 19689 and 19698 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19689 and 19698. First we will calculate the prime factors of 19689 and 19698.

Prime Factorization of 19689

Prime Factorization of 19698

Now multiplying the highest exponent prime factors to calculate the LCM of 19689 and 19698.

LCM(19689,19698) = 3¹ × 6563¹ × 2¹ × 7² × 67¹
LCM(19689,19698) = 129277974