What is the Least Common Multiple of 81785 and 81805?

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 81785 and 81805 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 81785 and 81805, than apply into the LCM equation.

GCF(81785,81805) = 5
LCM(81785,81805) = ( 81785 × 81805) / 5
LCM(81785,81805) = 6690421925 / 5
LCM(81785,81805) = 1338084385

Least Common Multiple (LCM) of 81785 and 81805 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 81785 and 81805. First we will calculate the prime factors of 81785 and 81805.

Prime Factorization of 81785

Prime Factorization of 81805

Now multiplying the highest exponent prime factors to calculate the LCM of 81785 and 81805.

LCM(81785,81805) = 5¹ × 11¹ × 1487¹ × 16361¹
LCM(81785,81805) = 1338084385