19905920

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1637}}^1$

素因数の和:1675

約数の個数: 64

約数和(自身を含む): 50122800

約数和(自身を除く): 30216880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 1637, 2432, 3040, 3274, 6080, 6548, 8185, 12160, 13096, 16370, 26192, 31103, 32740, 52384, 62206, 65480, 104768, 124412, 130960, 155515, 209536, 248824, 261920, 311030, 497648, 523840, 622060, 995296, 1047680, 1244120, 1990592, 2488240, 3981184, 4976480, 9952960, 19905920]

約数ペア:

[(1, 19905920), (2, 9952960), (4, 4976480), (5, 3981184), (8, 2488240), (10, 1990592), (16, 1244120), (19, 1047680), (20, 995296), (32, 622060), (38, 523840), (40, 497648), (64, 311030), (76, 261920), (80, 248824), (95, 209536), (128, 155515), (152, 130960), (160, 124412), (190, 104768), (304, 65480), (320, 62206), (380, 52384), (608, 32740), (640, 31103), (760, 26192), (1216, 16370), (1520, 13096), (1637, 12160), (2432, 8185), (3040, 6548), (3274, 6080)]