What is the Least Common Multiple of 627 and 642?
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 627 and 642 is 134178.
LCM(627,642) = 134178
Least Common Multiple of 627 and 642 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 627 and 642, than apply into the LCM equation.
GCF(627,642) = 3
LCM(627,642) = ( 627 × 642) / 3
LCM(627,642) = 402534 / 3
LCM(627,642) = 134178
Least Common Multiple (LCM) of 627 and 642 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 627 and 642. First we will calculate the prime factors of 627 and 642.
Prime Factorization of 627
Prime factors of 627 are 3, 11, 19. Prime factorization of 627 in exponential form is:
627 = 31 × 111 × 191
Prime Factorization of 642
Prime factors of 642 are 2, 3, 107. Prime factorization of 642 in exponential form is:
642 = 21 × 31 × 1071
Now multiplying the highest exponent prime factors to calculate the LCM of 627 and 642.
LCM(627,642) = 31 × 111 × 191 × 21 × 1071
LCM(627,642) = 134178
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