63
21,3
7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63=21x3=3x7x3
63 ^ 7*9 ^ 3*3
63 21,3 7,3,3
63 21,3 7,3,3
63 21,3 7,3,3
63 3,21 3,3,7 35 5,7
No. 168 is not a factor of 63. Factors of a number are smaller than the number.
3*3*7
9 is a square number and is a factor of 63