合数查询
8
499722到499828的合数
499722
499723
499724
499725
499726
499727
499728
499730
499731
499732
499733
499734
499735
499736
499737
499738
499740
499741
499742
499743
499744
499745
499746
499748
499749
499750
499751
499752
499753
499754
499755
499756
499757
499758
499759
499760
499761
499762
499763
499764
499765
499766
499767
499768
499769
499770
499771
499772
499773
499774
499775
499776
499777
499778
499779
499780
499782
499783
499784
499785
499786
499788
499789
499790
499791
499792
499793
499794
499795
499796
499797
499798
499799
499800
499802
499803
499804
499805
499806
499807
499808
499809
499810
499811
499812
499813
499814
499815
499816
499817
499818
499820
499821
499822
499823
499824
499825
499826
499827
499828
合数是至少有三个正因数的自然数，奇合数构成算术级数定理（狄利克雷定理）。卡迈克尔数是绝对伪素数，满足对所有基数的费马同余。合数分解是公钥密码分析的核心问题，未被证明是否属于NP完全问题。最小合数为4，唯一偶合数为2的例外。