What is the Least Common Multiple of 1642 and 1661?

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 1642 and 1661 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1642 and 1661, than apply into the LCM equation.

GCF(1642,1661) = 1
LCM(1642,1661) = ( 1642 × 1661) / 1
LCM(1642,1661) = 2727362 / 1
LCM(1642,1661) = 2727362

Least Common Multiple (LCM) of 1642 and 1661 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1642 and 1661. First we will calculate the prime factors of 1642 and 1661.

Prime Factorization of 1642

Prime Factorization of 1661

Now multiplying the highest exponent prime factors to calculate the LCM of 1642 and 1661.

LCM(1642,1661) = 2¹ × 821¹ × 11¹ × 151¹
LCM(1642,1661) = 2727362