What is the Least Common Multiple of 636 and 656?
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 636 and 656 is 104304.
LCM(636,656) = 104304
Least Common Multiple of 636 and 656 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 636 and 656, than apply into the LCM equation.
GCF(636,656) = 4
LCM(636,656) = ( 636 × 656) / 4
LCM(636,656) = 417216 / 4
LCM(636,656) = 104304
Least Common Multiple (LCM) of 636 and 656 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 636 and 656. First we will calculate the prime factors of 636 and 656.
Prime Factorization of 636
Prime factors of 636 are 2, 3, 53. Prime factorization of 636 in exponential form is:
636 = 22 × 31 × 531
Prime Factorization of 656
Prime factors of 656 are 2, 41. Prime factorization of 656 in exponential form is:
656 = 24 × 411
Now multiplying the highest exponent prime factors to calculate the LCM of 636 and 656.
LCM(636,656) = 24 × 31 × 531 × 411
LCM(636,656) = 104304
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