fpb dari 175dan 180 menggunakan pohon faktor

175
/\
5 35
....../\
.....5 7

180
/\
2 90
...../\
....2 45
........./\
........3 15
............./\
............3 5

175 = 5^2 x 7
180 = 2^2 x 3^2 x 5
FPB = 5

175 180
^ ^
5 35 5 40
^ ^
5 7 5 8
^
2 4
^
2 2