What is the Least Common Multiple of 68960 and 68972?

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 68960 and 68972 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 68960 and 68972, than apply into the LCM equation.

GCF(68960,68972) = 4
LCM(68960,68972) = ( 68960 × 68972) / 4
LCM(68960,68972) = 4756309120 / 4
LCM(68960,68972) = 1189077280

Least Common Multiple (LCM) of 68960 and 68972 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 68960 and 68972. First we will calculate the prime factors of 68960 and 68972.

Prime Factorization of 68960

Prime Factorization of 68972

Now multiplying the highest exponent prime factors to calculate the LCM of 68960 and 68972.

LCM(68960,68972) = 2⁵ × 5¹ × 431¹ × 43¹ × 401¹
LCM(68960,68972) = 1189077280