Math problem, what's the answer here (prime factorization)?

Question

what's the answer here?? using prime factorization

1.652

2. 275

3. 936

4. 152

5. 332

6. 549

7. 3108

8. 5250

9. 13 248

10. 700 000

11. 1260

12. 5400

13. 11160

14. 3600

15. 4320

16. 9360

17. 11979

18. 900 000

19. 180

20. 460

Note: It's okay if you can't answer this all...^^

Answer 1

"only" 20? Do you know all divisibility criteria? Revise if you don't!!!

936 = 9(104)=9(8)13= 3^2(2^3)(13)