What is the Least Common Multiple of 1345 and 1355?

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 1345 and 1355 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1345 and 1355, than apply into the LCM equation.

GCF(1345,1355) = 5
LCM(1345,1355) = ( 1345 × 1355) / 5
LCM(1345,1355) = 1822475 / 5
LCM(1345,1355) = 364495

Least Common Multiple (LCM) of 1345 and 1355 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1345 and 1355. First we will calculate the prime factors of 1345 and 1355.

Prime Factorization of 1345

Prime Factorization of 1355

Now multiplying the highest exponent prime factors to calculate the LCM of 1345 and 1355.

LCM(1345,1355) = 5¹ × 269¹ × 271¹
LCM(1345,1355) = 364495