What is the Least Common Multiple of 981 and 985?
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 981 and 985 is 966285.
LCM(981,985) = 966285
Least Common Multiple of 981 and 985 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 981 and 985, than apply into the LCM equation.
GCF(981,985) = 1
LCM(981,985) = ( 981 × 985) / 1
LCM(981,985) = 966285 / 1
LCM(981,985) = 966285
Least Common Multiple (LCM) of 981 and 985 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 981 and 985. First we will calculate the prime factors of 981 and 985.
Prime Factorization of 981
Prime factors of 981 are 3, 109. Prime factorization of 981 in exponential form is:
981 = 32 × 1091
Prime Factorization of 985
Prime factors of 985 are 5, 197. Prime factorization of 985 in exponential form is:
985 = 51 × 1971
Now multiplying the highest exponent prime factors to calculate the LCM of 981 and 985.
LCM(981,985) = 32 × 1091 × 51 × 1971
LCM(981,985) = 966285
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