What is the Least Common Multiple of 771 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 771 and 781 is 602151.
LCM(771,781) = 602151
Least Common Multiple of 771 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 771 and 781, than apply into the LCM equation.
GCF(771,781) = 1
LCM(771,781) = ( 771 × 781) / 1
LCM(771,781) = 602151 / 1
LCM(771,781) = 602151
Least Common Multiple (LCM) of 771 and 781 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 771 and 781. First we will calculate the prime factors of 771 and 781.
Prime Factorization of 771
Prime factors of 771 are 3, 257. Prime factorization of 771 in exponential form is:
771 = 31 × 2571
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 771 and 781.
LCM(771,781) = 31 × 2571 × 111 × 711
LCM(771,781) = 602151
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