What is the Least Common Multiple of 67216 and 67220?

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 67216 and 67220 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 67216 and 67220, than apply into the LCM equation.

GCF(67216,67220) = 4
LCM(67216,67220) = ( 67216 × 67220) / 4
LCM(67216,67220) = 4518259520 / 4
LCM(67216,67220) = 1129564880

Least Common Multiple (LCM) of 67216 and 67220 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 67216 and 67220. First we will calculate the prime factors of 67216 and 67220.

Prime Factorization of 67216

Prime Factorization of 67220

Now multiplying the highest exponent prime factors to calculate the LCM of 67216 and 67220.

LCM(67216,67220) = 2⁴ × 4201¹ × 5¹ × 3361¹
LCM(67216,67220) = 1129564880