What is the Least Common Multiple of 21791 and 21797?

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 21791 and 21797 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21791 and 21797, than apply into the LCM equation.

GCF(21791,21797) = 1
LCM(21791,21797) = ( 21791 × 21797) / 1
LCM(21791,21797) = 474978427 / 1
LCM(21791,21797) = 474978427

Least Common Multiple (LCM) of 21791 and 21797 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21791 and 21797. First we will calculate the prime factors of 21791 and 21797.

Prime Factorization of 21791

Prime Factorization of 21797

Now multiplying the highest exponent prime factors to calculate the LCM of 21791 and 21797.

LCM(21791,21797) = 7¹ × 11¹ × 283¹ × 71¹ × 307¹
LCM(21791,21797) = 474978427