GCF and LCM Calculator Logo

What is the Least Common Multiple of 781 and 787?

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 781 and 787 is 614647.

LCM(781,787) = 614647

LCM Calculator and
and

Least Common Multiple of 781 and 787 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 781 and 787, than apply into the LCM equation.

GCF(781,787) = 1
LCM(781,787) = ( 781 × 787) / 1
LCM(781,787) = 614647 / 1
LCM(781,787) = 614647

Least Common Multiple (LCM) of 781 and 787 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 781 and 787. First we will calculate the prime factors of 781 and 787.

Prime Factorization of 781

Prime factors of 781 are 11, 71. Prime factorization of 781 in exponential form is:

781 = 111 × 711

Prime Factorization of 787

Prime factors of 787 are 787. Prime factorization of 787 in exponential form is:

787 = 7871

Now multiplying the highest exponent prime factors to calculate the LCM of 781 and 787.

LCM(781,787) = 111 × 711 × 7871
LCM(781,787) = 614647