What is the Least Common Multiple of 768 and 785?
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 768 and 785 is 602880.
LCM(768,785) = 602880
Least Common Multiple of 768 and 785 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 768 and 785, than apply into the LCM equation.
GCF(768,785) = 1
LCM(768,785) = ( 768 × 785) / 1
LCM(768,785) = 602880 / 1
LCM(768,785) = 602880
Least Common Multiple (LCM) of 768 and 785 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 768 and 785. First we will calculate the prime factors of 768 and 785.
Prime Factorization of 768
Prime factors of 768 are 2, 3. Prime factorization of 768 in exponential form is:
768 = 28 × 31
Prime Factorization of 785
Prime factors of 785 are 5, 157. Prime factorization of 785 in exponential form is:
785 = 51 × 1571
Now multiplying the highest exponent prime factors to calculate the LCM of 768 and 785.
LCM(768,785) = 28 × 31 × 51 × 1571
LCM(768,785) = 602880
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