20765804800

素因数分解:

$2^8\times 5^2\times {\mathrm{13}}^1\times {\mathrm{249589}}^1$

素因数の和:249628

約数の個数: 108

約数和(自身を含む): 55352572660

約数和(自身を除く): 34586767860

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 128, 130, 160, 200, 208, 256, 260, 320, 325, 400, 416, 520, 640, 650, 800, 832, 1040, 1280, 1300, 1600, 1664, 2080, 2600, 3200, 3328, 4160, 5200, 6400, 8320, 10400, 16640, 20800, 41600, 83200, 249589, 499178, 998356, 1247945, 1996712, 2495890, 3244657, 3993424, 4991780, 6239725, 6489314, 7986848, 9983560, 12479450, 12978628, 15973696, 16223285, 19967120, 24958900, 25957256, 31947392, 32446570, 39934240, 49917800, 51914512, 63894784, 64893140, 79868480, 81116425, 99835600, 103829024, 129786280, 159736960, 162232850, 199671200, 207658048, 259572560, 319473920, 324465700, 399342400, 415316096, 519145120, 648931400, 798684800, 830632192, 1038290240, 1297862800, 1597369600, 2076580480, 2595725600, 4153160960, 5191451200, 10382902400, 20765804800]

約数ペア:

[(1, 20765804800), (2, 10382902400), (4, 5191451200), (5, 4153160960), (8, 2595725600), (10, 2076580480), (13, 1597369600), (16, 1297862800), (20, 1038290240), (25, 830632192), (26, 798684800), (32, 648931400), (40, 519145120), (50, 415316096), (52, 399342400), (64, 324465700), (65, 319473920), (80, 259572560), (100, 207658048), (104, 199671200), (128, 162232850), (130, 159736960), (160, 129786280), (200, 103829024), (208, 99835600), (256, 81116425), (260, 79868480), (320, 64893140), (325, 63894784), (400, 51914512), (416, 49917800), (520, 39934240), (640, 32446570), (650, 31947392), (800, 25957256), (832, 24958900), (1040, 19967120), (1280, 16223285), (1300, 15973696), (1600, 12978628), (1664, 12479450), (2080, 9983560), (2600, 7986848), (3200, 6489314), (3328, 6239725), (4160, 4991780), (5200, 3993424), (6400, 3244657), (8320, 2495890), (10400, 1996712), (16640, 1247945), (20800, 998356), (41600, 499178), (83200, 249589)]