The factors of 30 are 1,2,3,5,6,10,15,30 
Explanation: 
Factors are whole numbers that are multiplied together to produce another number. The original numbers are factors of the product number. 
If a x b = c then a and b are factors of c.
So we can write the number 30 as 
 30 x 1 = 30
15 x 2 = 30
10 x 3 = 30
6 x 5 = 30
So, all the possible factors of 30 are 1,2,3,5,6,10,15,30