To find the least common multiple of numbers there are two methods. #1 You list the multiples of each number. Identify the least number that is on both lists. #2 Find the common factors of the numbers.
In this case their are no common factors because 23 is prime.
Here's what you do:
1. Find the prime factorization of 21 and 23. 21=7*3 23=23
2. Take the factors and multiply them all together once because each one is only shown once.
7*3*23=?
3. 7 times 3 equals 21 times 23 is 483.
LCM=483
The least common multiple of two numbers is the product of the two numbers divided by their greatest common factor. The greatest common factor of 5 and 23 is 1. (See related question "What is the greatest common factor of 5 and 23?" for this calculation.) So, the least common multiple is 5 x 23 ÷ 1 = 115.
391
The Least Common Multiple (LCM) for 3 23 is 69.
35 and 70, among others.
The least common multiple of the numbers 13, 23 and 48 is 14,352.
The Least Common Multiple (LCM) for 23 21 is 483.
It is: 483
966
The least common multiple of 23 and 47 is 1081.
Least Common Multiple (LCM) for 39 23 is 897.
What is the least common multiple of 11 23?
The Least Common Multiple (LCM) of (12,23) is 276.
The least common multiple of 4 , 23 = 92
The least common multiple of 50 , 23 = 1,150
The least common multiple of 3 , 23 = 69
The Least Common Multiple (LCM) for 23 784 is 18,032.
Least common multiple of 36 and 23 is 828.