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Least Common Multiple of 40 and 58

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 40 and 58 is 1160.

LCM(40,58) = 1160

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Least Common Multiple of 40 and 58 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 40 and 58, than apply into the LCM equation.

GCF(40,58) = 2
LCM(40,58) = ( 40 × 58) / 2
LCM(40,58) = 2320 / 2
LCM(40,58) = 1160

Least Common Multiple (LCM) of 40 and 58 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 40 and 58. First we will calculate the prime factors of 40 and 58.

Prime Factorization of 40

Prime factors of 40 are 2, 5. Prime factorization of 40 in exponential form is:

40 = 23 × 51

Prime Factorization of 58

Prime factors of 58 are 2, 29. Prime factorization of 58 in exponential form is:

58 = 21 × 291

Now multiplying the highest exponent prime factors to calculate the LCM of 40 and 58.

LCM(40,58) = 23 × 51 × 291
LCM(40,58) = 1160

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