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What is the Least Common Multiple of 1398 and 1416?

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 1398 and 1416 is 329928.

LCM(1398,1416) = 329928

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Least Common Multiple of 1398 and 1416 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1398 and 1416, than apply into the LCM equation.

GCF(1398,1416) = 6
LCM(1398,1416) = ( 1398 × 1416) / 6
LCM(1398,1416) = 1979568 / 6
LCM(1398,1416) = 329928

Least Common Multiple (LCM) of 1398 and 1416 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1398 and 1416. First we will calculate the prime factors of 1398 and 1416.

Prime Factorization of 1398

Prime factors of 1398 are 2, 3, 233. Prime factorization of 1398 in exponential form is:

1398 = 21 × 31 × 2331

Prime Factorization of 1416

Prime factors of 1416 are 2, 3, 59. Prime factorization of 1416 in exponential form is:

1416 = 23 × 31 × 591

Now multiplying the highest exponent prime factors to calculate the LCM of 1398 and 1416.

LCM(1398,1416) = 23 × 31 × 2331 × 591
LCM(1398,1416) = 329928