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What is the Least Common Multiple of 445 and 455?

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 445 and 455 is 40495.

LCM(445,455) = 40495

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Least Common Multiple of 445 and 455 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 445 and 455, than apply into the LCM equation.

GCF(445,455) = 5
LCM(445,455) = ( 445 × 455) / 5
LCM(445,455) = 202475 / 5
LCM(445,455) = 40495

Least Common Multiple (LCM) of 445 and 455 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 445 and 455. First we will calculate the prime factors of 445 and 455.

Prime Factorization of 445

Prime factors of 445 are 5, 89. Prime factorization of 445 in exponential form is:

445 = 51 × 891

Prime Factorization of 455

Prime factors of 455 are 5, 7, 13. Prime factorization of 455 in exponential form is:

455 = 51 × 71 × 131

Now multiplying the highest exponent prime factors to calculate the LCM of 445 and 455.

LCM(445,455) = 51 × 891 × 71 × 131
LCM(445,455) = 40495