What is the Least Common Multiple of 978 and 982?
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 982 is 480198.
LCM(978,982) = 480198
Least Common Multiple of 978 and 982 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 982, than apply into the LCM equation.
GCF(978,982) = 2
LCM(978,982) = ( 978 × 982) / 2
LCM(978,982) = 960396 / 2
LCM(978,982) = 480198
Least Common Multiple (LCM) of 978 and 982 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 978 and 982. First we will calculate the prime factors of 978 and 982.
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 982
Prime factors of 982 are 2, 491. Prime factorization of 982 in exponential form is:
982 = 21 × 4911
Now multiplying the highest exponent prime factors to calculate the LCM of 978 and 982.
LCM(978,982) = 21 × 31 × 1631 × 4911
LCM(978,982) = 480198
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