What is the Least Common Multiple of 980 and 992?
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 980 and 992 is 243040.
LCM(980,992) = 243040
Least Common Multiple of 980 and 992 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 980 and 992, than apply into the LCM equation.
GCF(980,992) = 4
LCM(980,992) = ( 980 × 992) / 4
LCM(980,992) = 972160 / 4
LCM(980,992) = 243040
Least Common Multiple (LCM) of 980 and 992 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 980 and 992. First we will calculate the prime factors of 980 and 992.
Prime Factorization of 980
Prime factors of 980 are 2, 5, 7. Prime factorization of 980 in exponential form is:
980 = 22 × 51 × 72
Prime Factorization of 992
Prime factors of 992 are 2, 31. Prime factorization of 992 in exponential form is:
992 = 25 × 311
Now multiplying the highest exponent prime factors to calculate the LCM of 980 and 992.
LCM(980,992) = 25 × 51 × 72 × 311
LCM(980,992) = 243040
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