It is: 1+2+4 = 7
It is: 1+2 = 3
Since 12 is a factor of 84, all of its factors are common.
It is only possible to have one even prime factor of any number - as there is only one even prime number, 2. The sum of these is therefore 2.
All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors because they are factors that the numbers have in common. 3 is a factor of 12. 3 is a factor of 15. 3 is a common factor of 12 and 15.
The common factors of 12 and 14 are 1 and 21 and 2
It is: 1+2 = 3
The sum of all the positive factors of 12 is 28.
28
1 + 2 + 3 + 6 = 12
1 + 3 = 4
1 + 2 + 4 = 7
Since 12 is a factor of 84, all of its factors are common.
The common factors are: 1, 2, 3, 4, 6, 12.
The common factors of 12 and 16 are 1, 2 and 4.
The number is 6.
factors for 30 15,1,30,2 factors for 12 6,2,1,12,4,3
Since 12 is a factor of 36, all of the factors of 12 are common to 36.