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What is the Least Common Multiple of 1955 and 1961?

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 1955 and 1961 is 3833755.

LCM(1955,1961) = 3833755

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Least Common Multiple of 1955 and 1961 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1955 and 1961, than apply into the LCM equation.

GCF(1955,1961) = 1
LCM(1955,1961) = ( 1955 × 1961) / 1
LCM(1955,1961) = 3833755 / 1
LCM(1955,1961) = 3833755

Least Common Multiple (LCM) of 1955 and 1961 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1955 and 1961. First we will calculate the prime factors of 1955 and 1961.

Prime Factorization of 1955

Prime factors of 1955 are 5, 17, 23. Prime factorization of 1955 in exponential form is:

1955 = 51 × 171 × 231

Prime Factorization of 1961

Prime factors of 1961 are 37, 53. Prime factorization of 1961 in exponential form is:

1961 = 371 × 531

Now multiplying the highest exponent prime factors to calculate the LCM of 1955 and 1961.

LCM(1955,1961) = 51 × 171 × 231 × 371 × 531
LCM(1955,1961) = 3833755