281405960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:903

約数の個数: 128

約数和(自身を含む): 745718400

約数和(自身を除く): 464312440

約数列:

[1, 2, 4, 5, 8, 10, 11, 19, 20, 22, 38, 40, 41, 44, 55, 76, 82, 88, 95, 110, 152, 164, 190, 205, 209, 220, 328, 380, 410, 418, 440, 451, 760, 779, 820, 821, 836, 902, 1045, 1558, 1640, 1642, 1672, 1804, 2090, 2255, 3116, 3284, 3608, 3895, 4105, 4180, 4510, 6232, 6568, 7790, 8210, 8360, 8569, 9020, 9031, 15580, 15599, 16420, 17138, 18040, 18062, 31160, 31198, 32840, 33661, 34276, 36124, 42845, 45155, 62396, 67322, 68552, 72248, 77995, 85690, 90310, 124792, 134644, 155990, 168305, 171380, 171589, 180620, 269288, 311980, 336610, 342760, 343178, 361240, 370271, 623960, 639559, 673220, 686356, 740542, 857945, 1279118, 1346440, 1372712, 1481084, 1715890, 1851355, 2558236, 2962168, 3197795, 3431780, 3702710, 5116472, 6395590, 6863560, 7035149, 7405420, 12791180, 14070298, 14810840, 25582360, 28140596, 35175745, 56281192, 70351490, 140702980, 281405960]

約数ペア:

[(1, 281405960), (2, 140702980), (4, 70351490), (5, 56281192), (8, 35175745), (10, 28140596), (11, 25582360), (19, 14810840), (20, 14070298), (22, 12791180), (38, 7405420), (40, 7035149), (41, 6863560), (44, 6395590), (55, 5116472), (76, 3702710), (82, 3431780), (88, 3197795), (95, 2962168), (110, 2558236), (152, 1851355), (164, 1715890), (190, 1481084), (205, 1372712), (209, 1346440), (220, 1279118), (328, 857945), (380, 740542), (410, 686356), (418, 673220), (440, 639559), (451, 623960), (760, 370271), (779, 361240), (820, 343178), (821, 342760), (836, 336610), (902, 311980), (1045, 269288), (1558, 180620), (1640, 171589), (1642, 171380), (1672, 168305), (1804, 155990), (2090, 134644), (2255, 124792), (3116, 90310), (3284, 85690), (3608, 77995), (3895, 72248), (4105, 68552), (4180, 67322), (4510, 62396), (6232, 45155), (6568, 42845), (7790, 36124), (8210, 34276), (8360, 33661), (8569, 32840), (9020, 31198), (9031, 31160), (15580, 18062), (15599, 18040), (16420, 17138)]