What is the Least Common Multiple of 770 and 774?
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 770 and 774 is 297990.
LCM(770,774) = 297990
Least Common Multiple of 770 and 774 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 770 and 774, than apply into the LCM equation.
GCF(770,774) = 2
LCM(770,774) = ( 770 × 774) / 2
LCM(770,774) = 595980 / 2
LCM(770,774) = 297990
Least Common Multiple (LCM) of 770 and 774 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 770 and 774. First we will calculate the prime factors of 770 and 774.
Prime Factorization of 770
Prime factors of 770 are 2, 5, 7, 11. Prime factorization of 770 in exponential form is:
770 = 21 × 51 × 71 × 111
Prime Factorization of 774
Prime factors of 774 are 2, 3, 43. Prime factorization of 774 in exponential form is:
774 = 21 × 32 × 431
Now multiplying the highest exponent prime factors to calculate the LCM of 770 and 774.
LCM(770,774) = 21 × 51 × 71 × 111 × 32 × 431
LCM(770,774) = 297990
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