What is the Least Common Multiple of 838 and 856?
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 838 and 856 is 358664.
LCM(838,856) = 358664
Least Common Multiple of 838 and 856 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 838 and 856, than apply into the LCM equation.
GCF(838,856) = 2
LCM(838,856) = ( 838 × 856) / 2
LCM(838,856) = 717328 / 2
LCM(838,856) = 358664
Least Common Multiple (LCM) of 838 and 856 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 838 and 856. First we will calculate the prime factors of 838 and 856.
Prime Factorization of 838
Prime factors of 838 are 2, 419. Prime factorization of 838 in exponential form is:
838 = 21 × 4191
Prime Factorization of 856
Prime factors of 856 are 2, 107. Prime factorization of 856 in exponential form is:
856 = 23 × 1071
Now multiplying the highest exponent prime factors to calculate the LCM of 838 and 856.
LCM(838,856) = 23 × 4191 × 1071
LCM(838,856) = 358664
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