prime number greater than 2 is 3,5,7,11,13,... notice that these aren't factors of 16? so if #*n wants to be factor of 16n which is 1,2,4,8,16,and n, factors should be n,2n,4n,8n,16n. but 32n is over 16n. SIMPLY, a number that has greater absolute value can't be factor of a smaller number so 32n is wron