What is the Least Common Multiple of 19806 and 19815?

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 19806 and 19815 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19806 and 19815, than apply into the LCM equation.

GCF(19806,19815) = 3
LCM(19806,19815) = ( 19806 × 19815) / 3
LCM(19806,19815) = 392455890 / 3
LCM(19806,19815) = 130818630

Least Common Multiple (LCM) of 19806 and 19815 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19806 and 19815. First we will calculate the prime factors of 19806 and 19815.

Prime Factorization of 19806

Prime Factorization of 19815

Now multiplying the highest exponent prime factors to calculate the LCM of 19806 and 19815.

LCM(19806,19815) = 2¹ × 3¹ × 3301¹ × 5¹ × 1321¹
LCM(19806,19815) = 130818630