What is the Least Common Multiple of 65505 and 65520?

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 65505 and 65520 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 65505 and 65520, than apply into the LCM equation.

GCF(65505,65520) = 15
LCM(65505,65520) = ( 65505 × 65520) / 15
LCM(65505,65520) = 4291887600 / 15
LCM(65505,65520) = 286125840

Least Common Multiple (LCM) of 65505 and 65520 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 65505 and 65520. First we will calculate the prime factors of 65505 and 65520.

Prime Factorization of 65505

Prime Factorization of 65520

Now multiplying the highest exponent prime factors to calculate the LCM of 65505 and 65520.

LCM(65505,65520) = 3² × 5¹ × 11¹ × 397¹ × 2⁴ × 7¹ × 13¹
LCM(65505,65520) = 286125840