What is the Least Common Multiple of 81669 and 81681?

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 81669 and 81681 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81669 and 81681, than apply into the LCM equation.

GCF(81669,81681) = 3
LCM(81669,81681) = ( 81669 × 81681) / 3
LCM(81669,81681) = 6670805589 / 3
LCM(81669,81681) = 2223601863

Least Common Multiple (LCM) of 81669 and 81681 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81669 and 81681. First we will calculate the prime factors of 81669 and 81681.

Prime Factorization of 81669

Prime Factorization of 81681

Now multiplying the highest exponent prime factors to calculate the LCM of 81669 and 81681.

LCM(81669,81681) = 3¹ × 7¹ × 3889¹ × 19¹ × 1433¹
LCM(81669,81681) = 2223601863