What is the Least Common Multiple of 21968 and 21983?

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 21968 and 21983 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 21968 and 21983, than apply into the LCM equation.

GCF(21968,21983) = 1
LCM(21968,21983) = ( 21968 × 21983) / 1
LCM(21968,21983) = 482922544 / 1
LCM(21968,21983) = 482922544

Least Common Multiple (LCM) of 21968 and 21983 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 21968 and 21983. First we will calculate the prime factors of 21968 and 21983.

Prime Factorization of 21968

Prime Factorization of 21983

Now multiplying the highest exponent prime factors to calculate the LCM of 21968 and 21983.

LCM(21968,21983) = 2⁴ × 1373¹ × 13¹ × 19¹ × 89¹
LCM(21968,21983) = 482922544