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What is the Least Common Multiple of 31040 and 31056?

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 31040 and 31056 is 60248640.

LCM(31040,31056) = 60248640

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Least Common Multiple of 31040 and 31056 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31040 and 31056, than apply into the LCM equation.

GCF(31040,31056) = 16
LCM(31040,31056) = ( 31040 × 31056) / 16
LCM(31040,31056) = 963978240 / 16
LCM(31040,31056) = 60248640

Least Common Multiple (LCM) of 31040 and 31056 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 31040 and 31056. First we will calculate the prime factors of 31040 and 31056.

Prime Factorization of 31040

Prime factors of 31040 are 2, 5, 97. Prime factorization of 31040 in exponential form is:

31040 = 26 × 51 × 971

Prime Factorization of 31056

Prime factors of 31056 are 2, 3, 647. Prime factorization of 31056 in exponential form is:

31056 = 24 × 31 × 6471

Now multiplying the highest exponent prime factors to calculate the LCM of 31040 and 31056.

LCM(31040,31056) = 26 × 51 × 971 × 31 × 6471
LCM(31040,31056) = 60248640