What is the Least Common Multiple of 1781 and 1788?

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 1781 and 1788 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1781 and 1788, than apply into the LCM equation.

GCF(1781,1788) = 1
LCM(1781,1788) = ( 1781 × 1788) / 1
LCM(1781,1788) = 3184428 / 1
LCM(1781,1788) = 3184428

Least Common Multiple (LCM) of 1781 and 1788 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1781 and 1788. First we will calculate the prime factors of 1781 and 1788.

Prime Factorization of 1781

Prime Factorization of 1788

Now multiplying the highest exponent prime factors to calculate the LCM of 1781 and 1788.

LCM(1781,1788) = 13¹ × 137¹ × 2² × 3¹ × 149¹
LCM(1781,1788) = 3184428