What is the Least Common Multiple of 81509 and 81521?

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 81509 and 81521 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81509 and 81521, than apply into the LCM equation.

GCF(81509,81521) = 1
LCM(81509,81521) = ( 81509 × 81521) / 1
LCM(81509,81521) = 6644695189 / 1
LCM(81509,81521) = 6644695189

Least Common Multiple (LCM) of 81509 and 81521 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81509 and 81521. First we will calculate the prime factors of 81509 and 81521.

Prime Factorization of 81509

Prime Factorization of 81521

Now multiplying the highest exponent prime factors to calculate the LCM of 81509 and 81521.

LCM(81509,81521) = 81509¹ × 11¹ × 7411¹
LCM(81509,81521) = 6644695189