What is the Least Common Multiple of 774 and 784?
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 774 and 784 is 303408.
LCM(774,784) = 303408
Least Common Multiple of 774 and 784 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 774 and 784, than apply into the LCM equation.
GCF(774,784) = 2
LCM(774,784) = ( 774 × 784) / 2
LCM(774,784) = 606816 / 2
LCM(774,784) = 303408
Least Common Multiple (LCM) of 774 and 784 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 774 and 784. First we will calculate the prime factors of 774 and 784.
Prime Factorization of 774
Prime factors of 774 are 2, 3, 43. Prime factorization of 774 in exponential form is:
774 = 21 × 32 × 431
Prime Factorization of 784
Prime factors of 784 are 2, 7. Prime factorization of 784 in exponential form is:
784 = 24 × 72
Now multiplying the highest exponent prime factors to calculate the LCM of 774 and 784.
LCM(774,784) = 24 × 32 × 431 × 72
LCM(774,784) = 303408
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