What is the Least Common Multiple of 978 and 994?
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 978 and 994 is 486066.
LCM(978,994) = 486066
Least Common Multiple of 978 and 994 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 978 and 994, than apply into the LCM equation.
GCF(978,994) = 2
LCM(978,994) = ( 978 × 994) / 2
LCM(978,994) = 972132 / 2
LCM(978,994) = 486066
Least Common Multiple (LCM) of 978 and 994 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 978 and 994. First we will calculate the prime factors of 978 and 994.
Prime Factorization of 978
Prime factors of 978 are 2, 3, 163. Prime factorization of 978 in exponential form is:
978 = 21 × 31 × 1631
Prime Factorization of 994
Prime factors of 994 are 2, 7, 71. Prime factorization of 994 in exponential form is:
994 = 21 × 71 × 711
Now multiplying the highest exponent prime factors to calculate the LCM of 978 and 994.
LCM(978,994) = 21 × 31 × 1631 × 71 × 711
LCM(978,994) = 486066
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