Yes, the numbers 2, 3, 5, 6, 10, and 15 are factors of 30, as well as the numbers 1 and 30.
We know that this is the case as 30 can be divided by any of these numbers to produce an integer:
30 ÷ 2 = 15
30 ÷ 3 = 10
30 ÷ 5 = 6
These divisions also produce the other factors, 15, 10, and 6.
I hope this helps!