What is the Least Common Multiple of 397 and 413?

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 397 and 413 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 397 and 413, than apply into the LCM equation.

GCF(397,413) = 1
LCM(397,413) = ( 397 × 413) / 1
LCM(397,413) = 163961 / 1
LCM(397,413) = 163961

Least Common Multiple (LCM) of 397 and 413 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 397 and 413. First we will calculate the prime factors of 397 and 413.

Prime Factorization of 397

Prime Factorization of 413

Now multiplying the highest exponent prime factors to calculate the LCM of 397 and 413.

LCM(397,413) = 397¹ × 7¹ × 59¹
LCM(397,413) = 163961