21181456

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1811}}^1$

素因数の和:1879

約数の個数: 40

約数和(自身を含む): 44488224

約数和(自身を除く): 23306768

約数列:

[1, 2, 4, 8, 16, 17, 34, 43, 68, 86, 136, 172, 272, 344, 688, 731, 1462, 1811, 2924, 3622, 5848, 7244, 11696, 14488, 28976, 30787, 61574, 77873, 123148, 155746, 246296, 311492, 492592, 622984, 1245968, 1323841, 2647682, 5295364, 10590728, 21181456]

約数ペア:

[(1, 21181456), (2, 10590728), (4, 5295364), (8, 2647682), (16, 1323841), (17, 1245968), (34, 622984), (43, 492592), (68, 311492), (86, 246296), (136, 155746), (172, 123148), (272, 77873), (344, 61574), (688, 30787), (731, 28976), (1462, 14488), (1811, 11696), (2924, 7244), (3622, 5848)]