N 2 13 July 8, 2019 16 32 64 128 N 2 13n 40 N 2 13n 42 N 2 13n 30 N 2 13n N 2 13n 30 0 N 2 13n 12 N 2 13n 22 7 N 2 13n 36 N 2 13n 40 0 N 2 13 16 N 2 13 17 N 2 13n 22 N 2 13n 42 0 N 2 =- 13 4n N 2 13n 40 factor