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What is the Least Common Multiple of 7815 and 7831?

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 7815 and 7831 is 61199265.

LCM(7815,7831) = 61199265

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Least Common Multiple of 7815 and 7831 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7815 and 7831, than apply into the LCM equation.

GCF(7815,7831) = 1
LCM(7815,7831) = ( 7815 × 7831) / 1
LCM(7815,7831) = 61199265 / 1
LCM(7815,7831) = 61199265

Least Common Multiple (LCM) of 7815 and 7831 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7815 and 7831. First we will calculate the prime factors of 7815 and 7831.

Prime Factorization of 7815

Prime factors of 7815 are 3, 5, 521. Prime factorization of 7815 in exponential form is:

7815 = 31 × 51 × 5211

Prime Factorization of 7831

Prime factors of 7831 are 41, 191. Prime factorization of 7831 in exponential form is:

7831 = 411 × 1911

Now multiplying the highest exponent prime factors to calculate the LCM of 7815 and 7831.

LCM(7815,7831) = 31 × 51 × 5211 × 411 × 1911
LCM(7815,7831) = 61199265