First list the factors of 16:1,2,4,8,16. Start with the largest factor (16) and see if it is also a factor of 104 by dividing 104 by 16. When you do you get 6.5, so it is not a factor. So try 8, and when you do you get 13. So 8 is the largest factor of 16 and 104.
There are several pairs of numbers that have the greatest common factor of 8. 72, 88 104, 1048 8, 536 16, 56
Greatest common factor of 16 and 16 is 16.
The greatest common factor of 96 , 16 = 16
The greatest factor of 21 and 16 is 21, which is a factor of 21 but not of 16.
The greatest common factor for 16 and 38 is 2.
The greatest common factor of 16 and 34 is 2.
The greatest common factor for 15 and 16 is 1.
The greatest common factor of 16 and 28 is 4
The greatest common factor of 16 and 86 is 2.
The greatest common factor of 16 and 42 is 2.
the greatest common factor of 16 and 54 is 2