What is the Least Common Multiple of 19771 and 19781?

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 19771 and 19781 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 19771 and 19781, than apply into the LCM equation.

GCF(19771,19781) = 1
LCM(19771,19781) = ( 19771 × 19781) / 1
LCM(19771,19781) = 391090151 / 1
LCM(19771,19781) = 391090151

Least Common Multiple (LCM) of 19771 and 19781 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 19771 and 19781. First we will calculate the prime factors of 19771 and 19781.

Prime Factorization of 19771

Prime Factorization of 19781

Now multiplying the highest exponent prime factors to calculate the LCM of 19771 and 19781.

LCM(19771,19781) = 17¹ × 1163¹ × 131¹ × 151¹
LCM(19771,19781) = 391090151