What is the Least Common Multiple of 81221 and 81240?

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 81221 and 81240 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81221 and 81240, than apply into the LCM equation.

GCF(81221,81240) = 1
LCM(81221,81240) = ( 81221 × 81240) / 1
LCM(81221,81240) = 6598394040 / 1
LCM(81221,81240) = 6598394040

Least Common Multiple (LCM) of 81221 and 81240 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81221 and 81240. First we will calculate the prime factors of 81221 and 81240.

Prime Factorization of 81221

Prime Factorization of 81240

Now multiplying the highest exponent prime factors to calculate the LCM of 81221 and 81240.

LCM(81221,81240) = 7¹ × 41¹ × 283¹ × 2³ × 3¹ × 5¹ × 677¹
LCM(81221,81240) = 6598394040