What is the Least Common Multiple of 778 and 786?
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 778 and 786 is 305754.
LCM(778,786) = 305754
Least Common Multiple of 778 and 786 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 778 and 786, than apply into the LCM equation.
GCF(778,786) = 2
LCM(778,786) = ( 778 × 786) / 2
LCM(778,786) = 611508 / 2
LCM(778,786) = 305754
Least Common Multiple (LCM) of 778 and 786 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 778 and 786. First we will calculate the prime factors of 778 and 786.
Prime Factorization of 778
Prime factors of 778 are 2, 389. Prime factorization of 778 in exponential form is:
778 = 21 × 3891
Prime Factorization of 786
Prime factors of 786 are 2, 3, 131. Prime factorization of 786 in exponential form is:
786 = 21 × 31 × 1311
Now multiplying the highest exponent prime factors to calculate the LCM of 778 and 786.
LCM(778,786) = 21 × 3891 × 31 × 1311
LCM(778,786) = 305754
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