20781864

素因数分解:

$2^3\times 3^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{269}}^1$

素因数の和:347

約数の個数: 96

約数和(自身を含む): 60021000

約数和(自身を除く): 39239136

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 29, 36, 37, 58, 72, 74, 87, 111, 116, 148, 174, 222, 232, 261, 269, 296, 333, 348, 444, 522, 538, 666, 696, 807, 888, 1044, 1073, 1076, 1332, 1614, 2088, 2146, 2152, 2421, 2664, 3219, 3228, 4292, 4842, 6438, 6456, 7801, 8584, 9657, 9684, 9953, 12876, 15602, 19314, 19368, 19906, 23403, 25752, 29859, 31204, 38628, 39812, 46806, 59718, 62408, 70209, 77256, 79624, 89577, 93612, 119436, 140418, 179154, 187224, 238872, 280836, 288637, 358308, 561672, 577274, 716616, 865911, 1154548, 1731822, 2309096, 2597733, 3463644, 5195466, 6927288, 10390932, 20781864]

約数ペア:

[(1, 20781864), (2, 10390932), (3, 6927288), (4, 5195466), (6, 3463644), (8, 2597733), (9, 2309096), (12, 1731822), (18, 1154548), (24, 865911), (29, 716616), (36, 577274), (37, 561672), (58, 358308), (72, 288637), (74, 280836), (87, 238872), (111, 187224), (116, 179154), (148, 140418), (174, 119436), (222, 93612), (232, 89577), (261, 79624), (269, 77256), (296, 70209), (333, 62408), (348, 59718), (444, 46806), (522, 39812), (538, 38628), (666, 31204), (696, 29859), (807, 25752), (888, 23403), (1044, 19906), (1073, 19368), (1076, 19314), (1332, 15602), (1614, 12876), (2088, 9953), (2146, 9684), (2152, 9657), (2421, 8584), (2664, 7801), (3219, 6456), (3228, 6438), (4292, 4842)]