tolong bantu sahabat tentukan faktor prima

1. 28 = 7 & 2
2. 50 = 2 & 5
3. 24 = 2 & 3
4. 15 = 3 & 5
5. 16 = 2
6. 20 = 2 & 5
7. 60 = 2, 3 & 5
8. 64 = 2