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What is the Least Common Multiple of 15981 and 15997?

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 15981 and 15997 is 255648057.

LCM(15981,15997) = 255648057

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Least Common Multiple of 15981 and 15997 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 15981 and 15997, than apply into the LCM equation.

GCF(15981,15997) = 1
LCM(15981,15997) = ( 15981 × 15997) / 1
LCM(15981,15997) = 255648057 / 1
LCM(15981,15997) = 255648057

Least Common Multiple (LCM) of 15981 and 15997 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 15981 and 15997. First we will calculate the prime factors of 15981 and 15997.

Prime Factorization of 15981

Prime factors of 15981 are 3, 7, 761. Prime factorization of 15981 in exponential form is:

15981 = 31 × 71 × 7611

Prime Factorization of 15997

Prime factors of 15997 are 17, 941. Prime factorization of 15997 in exponential form is:

15997 = 171 × 9411

Now multiplying the highest exponent prime factors to calculate the LCM of 15981 and 15997.

LCM(15981,15997) = 31 × 71 × 7611 × 171 × 9411
LCM(15981,15997) = 255648057