What is the Least Common Multiple of 672 and 684?
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 672 and 684 is 38304.
LCM(672,684) = 38304
Least Common Multiple of 672 and 684 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 672 and 684, than apply into the LCM equation.
GCF(672,684) = 12
LCM(672,684) = ( 672 × 684) / 12
LCM(672,684) = 459648 / 12
LCM(672,684) = 38304
Least Common Multiple (LCM) of 672 and 684 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 672 and 684. First we will calculate the prime factors of 672 and 684.
Prime Factorization of 672
Prime factors of 672 are 2, 3, 7. Prime factorization of 672 in exponential form is:
672 = 25 × 31 × 71
Prime Factorization of 684
Prime factors of 684 are 2, 3, 19. Prime factorization of 684 in exponential form is:
684 = 22 × 32 × 191
Now multiplying the highest exponent prime factors to calculate the LCM of 672 and 684.
LCM(672,684) = 25 × 32 × 71 × 191
LCM(672,684) = 38304
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