What is the Least Common Multiple of 398 and 416?
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 398 and 416 is 82784.
LCM(398,416) = 82784
Least Common Multiple of 398 and 416 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 398 and 416, than apply into the LCM equation.
GCF(398,416) = 2
LCM(398,416) = ( 398 × 416) / 2
LCM(398,416) = 165568 / 2
LCM(398,416) = 82784
Least Common Multiple (LCM) of 398 and 416 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 398 and 416. First we will calculate the prime factors of 398 and 416.
Prime Factorization of 398
Prime factors of 398 are 2, 199. Prime factorization of 398 in exponential form is:
398 = 21 × 1991
Prime Factorization of 416
Prime factors of 416 are 2, 13. Prime factorization of 416 in exponential form is:
416 = 25 × 131
Now multiplying the highest exponent prime factors to calculate the LCM of 398 and 416.
LCM(398,416) = 25 × 1991 × 131
LCM(398,416) = 82784
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