Procedure to find the factors of 42: 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 42 1 X 42 = 42 2 X 21 = 42 3 X 14 = 42 6 X 7 = 42 7 X 6 = 42 14 X 3 = 42 21 X 2 = 42 42 X 1 = 42 as shown in the above table in first row multiply 1 by number 42. from second row try for all possible numbers so that their multiplication gives 42. then the first column shows the factors of number 42 which are shown in red colour: factors of number 42 are : 1, 2, 3, 6, 7, 14, 21, 42. if you divide the 42 with any one of the above factors reminder is zero