What is the Least Common Multiple of 320 and 340?
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 340 is 5440.
LCM(320,340) = 5440
Least Common Multiple of 320 and 340 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 340, than apply into the LCM equation.
GCF(320,340) = 20
LCM(320,340) = ( 320 × 340) / 20
LCM(320,340) = 108800 / 20
LCM(320,340) = 5440
Least Common Multiple (LCM) of 320 and 340 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 320 and 340. First we will calculate the prime factors of 320 and 340.
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 340
Prime factors of 340 are 2, 5, 17. Prime factorization of 340 in exponential form is:
340 = 22 × 51 × 171
Now multiplying the highest exponent prime factors to calculate the LCM of 320 and 340.
LCM(320,340) = 26 × 51 × 171
LCM(320,340) = 5440
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