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What is the Least Common Multiple of 1338 and 1345?

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 (LCM) of 1338 and 1345 is 1799610.

LCM(1338,1345) = 1799610

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Least Common Multiple of 1338 and 1345 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1338 and 1345, than apply into the LCM equation.

GCF(1338,1345) = 1
LCM(1338,1345) = ( 1338 × 1345) / 1
LCM(1338,1345) = 1799610 / 1
LCM(1338,1345) = 1799610

Least Common Multiple (LCM) of 1338 and 1345 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1338 and 1345. First we will calculate the prime factors of 1338 and 1345.

Prime Factorization of 1338

Prime factors of 1338 are 2, 3, 223. Prime factorization of 1338 in exponential form is:

1338 = 21 × 31 × 2231

Prime Factorization of 1345

Prime factors of 1345 are 5, 269. Prime factorization of 1345 in exponential form is:

1345 = 51 × 2691

Now multiplying the highest exponent prime factors to calculate the LCM of 1338 and 1345.

LCM(1338,1345) = 21 × 31 × 2231 × 51 × 2691
LCM(1338,1345) = 1799610