What is the Least Common Multiple of 81540 and 81557?

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 81540 and 81557 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81540 and 81557, than apply into the LCM equation.

GCF(81540,81557) = 1
LCM(81540,81557) = ( 81540 × 81557) / 1
LCM(81540,81557) = 6650157780 / 1
LCM(81540,81557) = 6650157780

Least Common Multiple (LCM) of 81540 and 81557 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81540 and 81557. First we will calculate the prime factors of 81540 and 81557.

Prime Factorization of 81540

Prime Factorization of 81557

Now multiplying the highest exponent prime factors to calculate the LCM of 81540 and 81557.

LCM(81540,81557) = 2² × 3³ × 5¹ × 151¹ × 7¹ × 61¹ × 191¹
LCM(81540,81557) = 6650157780