质数:5,7,67
合数:6,56,57,75,76,65,567,576,657,675,756,765
2的倍数:6,56,76,576,756
3的倍数6,57,75,567,576,657,675,756,765
5的倍数,5,65,75,675,765
既是3的倍数,又是5的倍数:75,675,765
质数:5,7,67
合数:6,56,57,75,76,65,567,576,657,675,756,765
2的倍数:6,56,76,576,756
3的倍数6,57,75,567,576,657,675,756,765
5的倍数,5,65,75,675,765
既是3的倍数,又是5的倍数:75,675,765