What is the Least Common Multiple of 1390 and 1397?

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 1390 and 1397 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1390 and 1397, than apply into the LCM equation.

GCF(1390,1397) = 1
LCM(1390,1397) = ( 1390 × 1397) / 1
LCM(1390,1397) = 1941830 / 1
LCM(1390,1397) = 1941830

Least Common Multiple (LCM) of 1390 and 1397 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1390 and 1397. First we will calculate the prime factors of 1390 and 1397.

Prime Factorization of 1390

Prime Factorization of 1397

Now multiplying the highest exponent prime factors to calculate the LCM of 1390 and 1397.

LCM(1390,1397) = 2¹ × 5¹ × 139¹ × 11¹ × 127¹
LCM(1390,1397) = 1941830