What is the Least Common Multiple of 7770 and 7781?

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 7770 and 7781 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7770 and 7781, than apply into the LCM equation.

GCF(7770,7781) = 1
LCM(7770,7781) = ( 7770 × 7781) / 1
LCM(7770,7781) = 60458370 / 1
LCM(7770,7781) = 60458370

Least Common Multiple (LCM) of 7770 and 7781 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7770 and 7781. First we will calculate the prime factors of 7770 and 7781.

Prime Factorization of 7770

Prime Factorization of 7781

Now multiplying the highest exponent prime factors to calculate the LCM of 7770 and 7781.

LCM(7770,7781) = 2¹ × 3¹ × 5¹ × 7¹ × 37¹ × 31¹ × 251¹
LCM(7770,7781) = 60458370