What is the Least Common Multiple of 780 and 793?
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 780 and 793 is 47580.
LCM(780,793) = 47580
Least Common Multiple of 780 and 793 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 780 and 793, than apply into the LCM equation.
GCF(780,793) = 13
LCM(780,793) = ( 780 × 793) / 13
LCM(780,793) = 618540 / 13
LCM(780,793) = 47580
Least Common Multiple (LCM) of 780 and 793 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 780 and 793. First we will calculate the prime factors of 780 and 793.
Prime Factorization of 780
Prime factors of 780 are 2, 3, 5, 13. Prime factorization of 780 in exponential form is:
780 = 22 × 31 × 51 × 131
Prime Factorization of 793
Prime factors of 793 are 13, 61. Prime factorization of 793 in exponential form is:
793 = 131 × 611
Now multiplying the highest exponent prime factors to calculate the LCM of 780 and 793.
LCM(780,793) = 22 × 31 × 51 × 131 × 611
LCM(780,793) = 47580
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