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What is the Least Common Multiple of 31185 and 31191?

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 31185 and 31191 is 324230445.

LCM(31185,31191) = 324230445

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Least Common Multiple of 31185 and 31191 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31185 and 31191, than apply into the LCM equation.

GCF(31185,31191) = 3
LCM(31185,31191) = ( 31185 × 31191) / 3
LCM(31185,31191) = 972691335 / 3
LCM(31185,31191) = 324230445

Least Common Multiple (LCM) of 31185 and 31191 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31185 and 31191. First we will calculate the prime factors of 31185 and 31191.

Prime Factorization of 31185

Prime factors of 31185 are 3, 5, 7, 11. Prime factorization of 31185 in exponential form is:

31185 = 34 × 51 × 71 × 111

Prime Factorization of 31191

Prime factors of 31191 are 3, 37, 281. Prime factorization of 31191 in exponential form is:

31191 = 31 × 371 × 2811

Now multiplying the highest exponent prime factors to calculate the LCM of 31185 and 31191.

LCM(31185,31191) = 34 × 51 × 71 × 111 × 371 × 2811
LCM(31185,31191) = 324230445