20956208

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{389}}^1$

素因数の和:454

約数の個数: 80

約数和(自身を含む): 51455040

約数和(自身を除く): 30498832

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 37, 52, 56, 74, 91, 104, 112, 148, 182, 208, 259, 296, 364, 389, 481, 518, 592, 728, 778, 962, 1036, 1456, 1556, 1924, 2072, 2723, 3112, 3367, 3848, 4144, 5057, 5446, 6224, 6734, 7696, 10114, 10892, 13468, 14393, 20228, 21784, 26936, 28786, 35399, 40456, 43568, 53872, 57572, 70798, 80912, 100751, 115144, 141596, 187109, 201502, 230288, 283192, 374218, 403004, 566384, 748436, 806008, 1309763, 1496872, 1612016, 2619526, 2993744, 5239052, 10478104, 20956208]

約数ペア:

[(1, 20956208), (2, 10478104), (4, 5239052), (7, 2993744), (8, 2619526), (13, 1612016), (14, 1496872), (16, 1309763), (26, 806008), (28, 748436), (37, 566384), (52, 403004), (56, 374218), (74, 283192), (91, 230288), (104, 201502), (112, 187109), (148, 141596), (182, 115144), (208, 100751), (259, 80912), (296, 70798), (364, 57572), (389, 53872), (481, 43568), (518, 40456), (592, 35399), (728, 28786), (778, 26936), (962, 21784), (1036, 20228), (1456, 14393), (1556, 13468), (1924, 10892), (2072, 10114), (2723, 7696), (3112, 6734), (3367, 6224), (3848, 5446), (4144, 5057)]