What is the Least Common Multiple of 31781 and 31790?

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 31781 and 31790 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31781 and 31790, than apply into the LCM equation.

GCF(31781,31790) = 1
LCM(31781,31790) = ( 31781 × 31790) / 1
LCM(31781,31790) = 1010317990 / 1
LCM(31781,31790) = 1010317990

Least Common Multiple (LCM) of 31781 and 31790 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31781 and 31790. First we will calculate the prime factors of 31781 and 31790.

Prime Factorization of 31781

Prime Factorization of 31790

Now multiplying the highest exponent prime factors to calculate the LCM of 31781 and 31790.

LCM(31781,31790) = 61¹ × 521¹ × 2¹ × 5¹ × 11¹ × 17²
LCM(31781,31790) = 1010317990