What is the Least Common Multiple of 1647 and 1655?

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 1647 and 1655 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1647 and 1655, than apply into the LCM equation.

GCF(1647,1655) = 1
LCM(1647,1655) = ( 1647 × 1655) / 1
LCM(1647,1655) = 2725785 / 1
LCM(1647,1655) = 2725785

Least Common Multiple (LCM) of 1647 and 1655 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1647 and 1655. First we will calculate the prime factors of 1647 and 1655.

Prime Factorization of 1647

Prime Factorization of 1655

Now multiplying the highest exponent prime factors to calculate the LCM of 1647 and 1655.

LCM(1647,1655) = 3³ × 61¹ × 5¹ × 331¹
LCM(1647,1655) = 2725785