What is the Least Common Multiple of 13781 and 13787?

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 of 13781 and 13787 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 13781 and 13787, than apply into the LCM equation.

GCF(13781,13787) = 1
LCM(13781,13787) = ( 13781 × 13787) / 1
LCM(13781,13787) = 189998647 / 1
LCM(13781,13787) = 189998647

Least Common Multiple (LCM) of 13781 and 13787 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 13781 and 13787. First we will calculate the prime factors of 13781 and 13787.

Prime Factorization of 13781

Prime Factorization of 13787

Now multiplying the highest exponent prime factors to calculate the LCM of 13781 and 13787.

LCM(13781,13787) = 13781¹ × 17¹ × 811¹
LCM(13781,13787) = 189998647