What is the Least Common Multiple of 19821 and 19831?

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 19821 and 19831 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19821 and 19831, than apply into the LCM equation.

GCF(19821,19831) = 1
LCM(19821,19831) = ( 19821 × 19831) / 1
LCM(19821,19831) = 393070251 / 1
LCM(19821,19831) = 393070251

Least Common Multiple (LCM) of 19821 and 19831 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19821 and 19831. First we will calculate the prime factors of 19821 and 19831.

Prime Factorization of 19821

Prime Factorization of 19831

Now multiplying the highest exponent prime factors to calculate the LCM of 19821 and 19831.

LCM(19821,19831) = 3¹ × 6607¹ × 7¹ × 2833¹
LCM(19821,19831) = 393070251