4 5 chia 2 7 July 8, 2019 16 32 64 128 4 mũ 5 chia 2 mũ 7 4 chia 5 2 x chia 2 7 4 15 chia 2 5 7 4 5 x 1 7 chia 2 2 3 chia 4 5 chia 7 12 2 5 1 4 chia 7 16 4 7 x 10 92 chia 5 2
