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What is the Least Common Multiple of 343 and 355?

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 343 and 355 is 121765.

LCM(343,355) = 121765

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Least Common Multiple of 343 and 355 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 343 and 355, than apply into the LCM equation.

GCF(343,355) = 1
LCM(343,355) = ( 343 × 355) / 1
LCM(343,355) = 121765 / 1
LCM(343,355) = 121765

Least Common Multiple (LCM) of 343 and 355 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 343 and 355. First we will calculate the prime factors of 343 and 355.

Prime Factorization of 343

Prime factors of 343 are 7. Prime factorization of 343 in exponential form is:

343 = 73

Prime Factorization of 355

Prime factors of 355 are 5, 71. Prime factorization of 355 in exponential form is:

355 = 51 × 711

Now multiplying the highest exponent prime factors to calculate the LCM of 343 and 355.

LCM(343,355) = 73 × 51 × 711
LCM(343,355) = 121765