How many ways can a gardener plant 30 trees in rows so that each row contains the sames number of trees?

Answer 1

Six ways.

15 rows of 2 trees

6 rows of 5 trees

3 rows of 10 trees

and

2 rows of 15 trees

5 rows of 6 trees

10 rows of 3 trees

* * * * *

How about 1 row of 30 trees

and

30 rows of 1 tree each?