What is the Least Common Multiple of 777 and 781?
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 777 and 781 is 606837.
LCM(777,781) = 606837
Least Common Multiple of 777 and 781 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 777 and 781, than apply into the LCM equation.
GCF(777,781) = 1
LCM(777,781) = ( 777 × 781) / 1
LCM(777,781) = 606837 / 1
LCM(777,781) = 606837
Least Common Multiple (LCM) of 777 and 781 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 777 and 781. First we will calculate the prime factors of 777 and 781.
Prime Factorization of 777
Prime factors of 777 are 3, 7, 37. Prime factorization of 777 in exponential form is:
777 = 31 × 71 × 371
Prime Factorization of 781
Prime factors of 781 are 11, 71. Prime factorization of 781 in exponential form is:
781 = 111 × 711
Now multiplying the highest exponent prime factors to calculate the LCM of 777 and 781.
LCM(777,781) = 31 × 71 × 371 × 111 × 711
LCM(777,781) = 606837
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