Common Factors Calculator
This is an online common factors calculator that computes the common factors of two or more positive integers. First, a lists of all factors of each number is displayed then a list of the commom factors to all these positive integers is displayed.
What is a factor of a number?
A number f is a factor of another number N if the division N ÷ f gives a remainder equal to zero.
3 is a factor of 6 because 6 ÷ 3 = 2 and the remainder is equal to 0.
3 is NOT a factor of 7 because 7 ÷ 3 gives a remainder equal to 1.
f is a factor of N also means that we can write N as a product (multiplication) of f and another number.
3 is a factor of 6 because 6 = 3 × 2.
The factors of each of the positive integers 12,18,30 are:
The factors of 12 are: 1 , 2 , 3 ,4, 6 ,12
The factors of 18 are: 1 , 2 , 3 , 6 ,9,18
The factors of 30 are: 1 , 2 , 3 ,5, 6 ,10,15,30
The factors in red are the common factors to all three numbers are therefore are listed below.
The common factors of 12,18,30 are:,1,2,3,6
and of course we may also deduce the greatest common factor (GCF) of the three numbers which in this case is 6.