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What is the Least Common Multiple of 12970 and 12985?

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 12970 and 12985 is 33683090.

LCM(12970,12985) = 33683090

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Least Common Multiple of 12970 and 12985 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12970 and 12985, than apply into the LCM equation.

GCF(12970,12985) = 5
LCM(12970,12985) = ( 12970 × 12985) / 5
LCM(12970,12985) = 168415450 / 5
LCM(12970,12985) = 33683090

Least Common Multiple (LCM) of 12970 and 12985 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12970 and 12985. First we will calculate the prime factors of 12970 and 12985.

Prime Factorization of 12970

Prime factors of 12970 are 2, 5, 1297. Prime factorization of 12970 in exponential form is:

12970 = 21 × 51 × 12971

Prime Factorization of 12985

Prime factors of 12985 are 5, 7, 53. Prime factorization of 12985 in exponential form is:

12985 = 51 × 72 × 531

Now multiplying the highest exponent prime factors to calculate the LCM of 12970 and 12985.

LCM(12970,12985) = 21 × 51 × 12971 × 72 × 531
LCM(12970,12985) = 33683090