Matching Pairs Factors listOnline version Yu can make a T-Chart to find all the factors of the given numbers by Eng. Heba El-Shimy 1 Factors List of 15 : 2 Factors List of 23: 3 Factors List of 36: 4 Factors List of 40: 5 Factors List of 50: 6 Factors List of 8: 1, 3, 5 and 15 1 and 23 1, 2, 4 and 8 1, 2, 5, 10, 25 and 50 1, 2, 4, 5, 8, 10, 20 and 40 1, 2, 3, 4, 6, 9, 12, 18 and 36