What is the Least Common Multiple of 628 and 648?
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 628 and 648 is 101736.
LCM(628,648) = 101736
Least Common Multiple of 628 and 648 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 628 and 648, than apply into the LCM equation.
GCF(628,648) = 4
LCM(628,648) = ( 628 × 648) / 4
LCM(628,648) = 406944 / 4
LCM(628,648) = 101736
Least Common Multiple (LCM) of 628 and 648 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 628 and 648. First we will calculate the prime factors of 628 and 648.
Prime Factorization of 628
Prime factors of 628 are 2, 157. Prime factorization of 628 in exponential form is:
628 = 22 × 1571
Prime Factorization of 648
Prime factors of 648 are 2, 3. Prime factorization of 648 in exponential form is:
648 = 23 × 34
Now multiplying the highest exponent prime factors to calculate the LCM of 628 and 648.
LCM(628,648) = 23 × 1571 × 34
LCM(628,648) = 101736
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