399267680

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{401}}^1$

素因数の和:557

約数の個数: 144

約数和(自身を含む): 1108670976

約数和(自身を除く): 709403296

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 127, 140, 160, 196, 224, 245, 254, 280, 392, 401, 490, 508, 560, 635, 784, 802, 889, 980, 1016, 1120, 1270, 1568, 1604, 1778, 1960, 2005, 2032, 2540, 2807, 3208, 3556, 3920, 4010, 4064, 4445, 5080, 5614, 6223, 6416, 7112, 7840, 8020, 8890, 10160, 11228, 12446, 12832, 14035, 14224, 16040, 17780, 19649, 20320, 22456, 24892, 28070, 28448, 31115, 32080, 35560, 39298, 44912, 49784, 50927, 56140, 62230, 64160, 71120, 78596, 89824, 98245, 99568, 101854, 112280, 124460, 142240, 157192, 196490, 199136, 203708, 224560, 248920, 254635, 314384, 356489, 392980, 407416, 449120, 497840, 509270, 628768, 712978, 785960, 814832, 995680, 1018540, 1425956, 1571920, 1629664, 1782445, 2037080, 2495423, 2851912, 3143840, 3564890, 4074160, 4990846, 5703824, 7129780, 8148320, 9981692, 11407648, 12477115, 14259560, 19963384, 24954230, 28519120, 39926768, 49908460, 57038240, 79853536, 99816920, 199633840, 399267680]

約数ペア:

[(1, 399267680), (2, 199633840), (4, 99816920), (5, 79853536), (7, 57038240), (8, 49908460), (10, 39926768), (14, 28519120), (16, 24954230), (20, 19963384), (28, 14259560), (32, 12477115), (35, 11407648), (40, 9981692), (49, 8148320), (56, 7129780), (70, 5703824), (80, 4990846), (98, 4074160), (112, 3564890), (127, 3143840), (140, 2851912), (160, 2495423), (196, 2037080), (224, 1782445), (245, 1629664), (254, 1571920), (280, 1425956), (392, 1018540), (401, 995680), (490, 814832), (508, 785960), (560, 712978), (635, 628768), (784, 509270), (802, 497840), (889, 449120), (980, 407416), (1016, 392980), (1120, 356489), (1270, 314384), (1568, 254635), (1604, 248920), (1778, 224560), (1960, 203708), (2005, 199136), (2032, 196490), (2540, 157192), (2807, 142240), (3208, 124460), (3556, 112280), (3920, 101854), (4010, 99568), (4064, 98245), (4445, 89824), (5080, 78596), (5614, 71120), (6223, 64160), (6416, 62230), (7112, 56140), (7840, 50927), (8020, 49784), (8890, 44912), (10160, 39298), (11228, 35560), (12446, 32080), (12832, 31115), (14035, 28448), (14224, 28070), (16040, 24892), (17780, 22456), (19649, 20320)]