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What is the Least Common Multiple of 7851 and 7870?

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 7851 and 7870 is 61787370.

LCM(7851,7870) = 61787370

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Least Common Multiple of 7851 and 7870 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7851 and 7870, than apply into the LCM equation.

GCF(7851,7870) = 1
LCM(7851,7870) = ( 7851 × 7870) / 1
LCM(7851,7870) = 61787370 / 1
LCM(7851,7870) = 61787370

Least Common Multiple (LCM) of 7851 and 7870 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7851 and 7870. First we will calculate the prime factors of 7851 and 7870.

Prime Factorization of 7851

Prime factors of 7851 are 3, 2617. Prime factorization of 7851 in exponential form is:

7851 = 31 × 26171

Prime Factorization of 7870

Prime factors of 7870 are 2, 5, 787. Prime factorization of 7870 in exponential form is:

7870 = 21 × 51 × 7871

Now multiplying the highest exponent prime factors to calculate the LCM of 7851 and 7870.

LCM(7851,7870) = 31 × 26171 × 21 × 51 × 7871
LCM(7851,7870) = 61787370