Example: 30 and 42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Select the highest amount of each factor.
2 x 3 x 5 x 7 = 210, the LCM
The LCM is their product.
The LCM of 4 and 9 is 36.
The LCM is the larger number. The LCM of 12 and 6 is 12.
You need at least two numbers to find an LCM.
The answer depends on what the "other" two numbers are.
In any list of distinct numbers, one will be greater than the others. In the list of common factors, one will be the greatest.
Two numbers that have no common factors greater than one are considered co-prime or relatively prime. Their LCM is their product.
The Greatest Common Factor depends upon the numbers for which there are common factors and it is the greatest one of them; it can be greater than 18, for example the greatest common factor of 40 and 100 is 20. The greatest common factor must be one of the factors of each of the numbers. As the factors of each number cannot be greater than that number, the greatest common factor of a set of numbers cannot be greater than the least number. If this number is not greater than 18 then the greatest common factor of the numbers cannot be greater than 18. Even if the least number is greater than 18 it is possible that the greatest common factor of a set of numbers is still not greater than 18, for example the greatest common factor of 20, 30 and 50 is 10.
The LCM is their product. The LCM of 27 and 35 is 945.
All nonzero numbers have factors. Some numbers have some of the same factors as other numbers. These are called common factors. Some factors are positive numbers. Common factors which are positive numbers would be called positive common factors.
All numbers have common factors greater than zero.
In any list of distinct numbers, one will be greater than the others. In the list of common factors, one will be the greatest.
The least common factor for two numbers is always one. The least common multiple for two numbers which have no common factors greater than one is their product.
Their product. The LCM of 4 and 9 is 36.
Two numbers that have no common factors greater than one are considered co-prime or relatively prime. Their LCM is their product.
If two numbers have no common factor greater then one, then their LCM is the two numbers multiplied together. Example: 9 and 14 have no common factors. Their LCM is 9 x 14, which is 126.
Their product.
The factors that they share. Example: 30 and 42 1,2,3,5,6,10,15,30 1,2,3,6,7,14,21,42 1,2,3 and 6 are the common factors, the factors in common.
The LCM is their product. The LCM of 4 and 9 is 36.
Their product.
They are called co-primes.
All nonzero numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors.Common factors are factors that two or more numbers have in common. These are factors that are the same. All integers will have 1 as a common factor. Some integers will have additional common factors. For example, 4 and 6 have as their common factors 1 and 2.Numbers that evenly divide one or more numbersEx: 2 is a common factor for the numbers 4 and 6