20545840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1931}}^1$

素因数の和:1970

約数の個数: 80

約数和(自身を含む): 57496320

約数和(自身を除く): 36950480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 1931, 2128, 2660, 3862, 5320, 7724, 9655, 10640, 13517, 15448, 19310, 27034, 30896, 36689, 38620, 54068, 67585, 73378, 77240, 108136, 135170, 146756, 154480, 183445, 216272, 256823, 270340, 293512, 366890, 513646, 540680, 587024, 733780, 1027292, 1081360, 1284115, 1467560, 2054584, 2568230, 2935120, 4109168, 5136460, 10272920, 20545840]

約数ペア:

[(1, 20545840), (2, 10272920), (4, 5136460), (5, 4109168), (7, 2935120), (8, 2568230), (10, 2054584), (14, 1467560), (16, 1284115), (19, 1081360), (20, 1027292), (28, 733780), (35, 587024), (38, 540680), (40, 513646), (56, 366890), (70, 293512), (76, 270340), (80, 256823), (95, 216272), (112, 183445), (133, 154480), (140, 146756), (152, 135170), (190, 108136), (266, 77240), (280, 73378), (304, 67585), (380, 54068), (532, 38620), (560, 36689), (665, 30896), (760, 27034), (1064, 19310), (1330, 15448), (1520, 13517), (1931, 10640), (2128, 9655), (2660, 7724), (3862, 5320)]