What is the Least Common Multiple of 407 and 423?
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 407 and 423 is 172161.
LCM(407,423) = 172161
Least Common Multiple of 407 and 423 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 407 and 423, than apply into the LCM equation.
GCF(407,423) = 1
LCM(407,423) = ( 407 × 423) / 1
LCM(407,423) = 172161 / 1
LCM(407,423) = 172161
Least Common Multiple (LCM) of 407 and 423 with Primes
Least common multiple can be found by multiplying the highest exponent prime factors of 407 and 423. First we will calculate the prime factors of 407 and 423.
Prime Factorization of 407
Prime factors of 407 are 11, 37. Prime factorization of 407 in exponential form is:
407 = 111 × 371
Prime Factorization of 423
Prime factors of 423 are 3, 47. Prime factorization of 423 in exponential form is:
423 = 32 × 471
Now multiplying the highest exponent prime factors to calculate the LCM of 407 and 423.
LCM(407,423) = 111 × 371 × 32 × 471
LCM(407,423) = 172161
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