What is the Least Common Multiple of 320 and 325?
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 320 and 325 is 20800.
LCM(320,325) = 20800
Least Common Multiple of 320 and 325 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 320 and 325, than apply into the LCM equation.
GCF(320,325) = 5
LCM(320,325) = ( 320 × 325) / 5
LCM(320,325) = 104000 / 5
LCM(320,325) = 20800
Least Common Multiple (LCM) of 320 and 325 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 320 and 325. First we will calculate the prime factors of 320 and 325.
Prime Factorization of 320
Prime factors of 320 are 2, 5. Prime factorization of 320 in exponential form is:
320 = 26 × 51
Prime Factorization of 325
Prime factors of 325 are 5, 13. Prime factorization of 325 in exponential form is:
325 = 52 × 131
Now multiplying the highest exponent prime factors to calculate the LCM of 320 and 325.
LCM(320,325) = 26 × 52 × 131
LCM(320,325) = 20800
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