No, 17 is not a factor of 64 because 64 can't be evenly divided by 17. Only the numbers which go into 64 are its factors. 17 goes into 64 three times with 13 as remainder i.e. 64 = 17 x 3 + 13.
68 can be divided evenly by 1, 2, 4, 17, 34, 68.
64 divided into 84 = 0.7619047619047619
1,664 divided by 64 is 26.
64 divided by 4 is 16.
64 divided into 143 = 0.44755244755244755
5.3333
18.8235
0.0034
7
160
3.2