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What is the Least Common Multiple of 7770 and 7784?

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 7770 and 7784 is 4320120.

LCM(7770,7784) = 4320120

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Least Common Multiple of 7770 and 7784 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7770 and 7784, than apply into the LCM equation.

GCF(7770,7784) = 14
LCM(7770,7784) = ( 7770 × 7784) / 14
LCM(7770,7784) = 60481680 / 14
LCM(7770,7784) = 4320120

Least Common Multiple (LCM) of 7770 and 7784 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7770 and 7784. First we will calculate the prime factors of 7770 and 7784.

Prime Factorization of 7770

Prime factors of 7770 are 2, 3, 5, 7, 37. Prime factorization of 7770 in exponential form is:

7770 = 21 × 31 × 51 × 71 × 371

Prime Factorization of 7784

Prime factors of 7784 are 2, 7, 139. Prime factorization of 7784 in exponential form is:

7784 = 23 × 71 × 1391

Now multiplying the highest exponent prime factors to calculate the LCM of 7770 and 7784.

LCM(7770,7784) = 23 × 31 × 51 × 71 × 371 × 1391
LCM(7770,7784) = 4320120