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What is the Least Common Multiple of 3969 and 3980?

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 3969 and 3980 is 15796620.

LCM(3969,3980) = 15796620

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Least Common Multiple of 3969 and 3980 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3969 and 3980, than apply into the LCM equation.

GCF(3969,3980) = 1
LCM(3969,3980) = ( 3969 × 3980) / 1
LCM(3969,3980) = 15796620 / 1
LCM(3969,3980) = 15796620

Least Common Multiple (LCM) of 3969 and 3980 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 3969 and 3980. First we will calculate the prime factors of 3969 and 3980.

Prime Factorization of 3969

Prime factors of 3969 are 3, 7. Prime factorization of 3969 in exponential form is:

3969 = 34 × 72

Prime Factorization of 3980

Prime factors of 3980 are 2, 5, 199. Prime factorization of 3980 in exponential form is:

3980 = 22 × 51 × 1991

Now multiplying the highest exponent prime factors to calculate the LCM of 3969 and 3980.

LCM(3969,3980) = 34 × 72 × 22 × 51 × 1991
LCM(3969,3980) = 15796620