21138944

素因数分解:

$2^9\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:131

約数の個数: 80

約数和(自身を含む): 46403280

約数和(自身を除く): 25264336

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 41, 53, 64, 76, 82, 106, 128, 152, 164, 212, 256, 304, 328, 424, 512, 608, 656, 779, 848, 1007, 1216, 1312, 1558, 1696, 2014, 2173, 2432, 2624, 3116, 3392, 4028, 4346, 4864, 5248, 6232, 6784, 8056, 8692, 9728, 10496, 12464, 13568, 16112, 17384, 20992, 24928, 27136, 32224, 34768, 41287, 49856, 64448, 69536, 82574, 99712, 128896, 139072, 165148, 199424, 257792, 278144, 330296, 398848, 515584, 556288, 660592, 1112576, 1321184, 2642368, 5284736, 10569472, 21138944]

約数ペア:

[(1, 21138944), (2, 10569472), (4, 5284736), (8, 2642368), (16, 1321184), (19, 1112576), (32, 660592), (38, 556288), (41, 515584), (53, 398848), (64, 330296), (76, 278144), (82, 257792), (106, 199424), (128, 165148), (152, 139072), (164, 128896), (212, 99712), (256, 82574), (304, 69536), (328, 64448), (424, 49856), (512, 41287), (608, 34768), (656, 32224), (779, 27136), (848, 24928), (1007, 20992), (1216, 17384), (1312, 16112), (1558, 13568), (1696, 12464), (2014, 10496), (2173, 9728), (2432, 8692), (2624, 8056), (3116, 6784), (3392, 6232), (4028, 5248), (4346, 4864)]