合数查询
8
499608到499721的合数
499608
499609
499610
499611
499612
499613
499614
499615
499616
499617
499618
499619
499620
499622
499623
499624
499625
499626
499627
499628
499629
499630
499631
499632
499634
499635
499636
499638
499639
499640
499641
499642
499643
499644
499645
499646
499647
499648
499650
499651
499652
499653
499654
499655
499656
499657
499658
499659
499660
499662
499664
499665
499666
499667
499668
499670
499671
499672
499674
499675
499676
499677
499678
499680
499681
499682
499683
499684
499685
499686
499688
499689
499690
499692
499694
499695
499696
499697
499698
499699
499700
499701
499702
499703
499704
499705
499706
499707
499708
499709
499710
499712
499713
499714
499715
499716
499718
499719
499720
499721
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。