procedure to find the factors of 60: when you want to start calculating the factors start from 1. 1 is a common factor for all numbers. the following table shows the factors of 60 1 X 60 = 60 2 X 30 = 60 3 X 20 = 60 4 X 15 = 60 5 X 12 = 60 6 X 10 = 60 10 X 6 = 60 12 X 5 = 60 15 X 4 = 60 20 X 3 = 60 30 X 2 = 60 60 X 1 = 60 as shown in the above table in first row multiply 1 by number 60. from second row try for all possible numbers so that their multiplication gives 60. then the first column shows the factors of number 60 which are shown in red colour: factors of nu