20985328

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:135

約数の個数: 120

約数和(自身を含む): 53434080

約数和(自身を除く): 32448752

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 29, 49, 52, 56, 58, 71, 91, 98, 104, 112, 116, 142, 182, 196, 203, 208, 232, 284, 364, 377, 392, 406, 464, 497, 568, 637, 728, 754, 784, 812, 923, 994, 1136, 1274, 1421, 1456, 1508, 1624, 1846, 1988, 2059, 2548, 2639, 2842, 3016, 3248, 3479, 3692, 3976, 4118, 5096, 5278, 5684, 6032, 6461, 6958, 7384, 7952, 8236, 10192, 10556, 11368, 12922, 13916, 14413, 14768, 16472, 18473, 21112, 22736, 25844, 26767, 27832, 28826, 32944, 36946, 42224, 45227, 51688, 53534, 55664, 57652, 73892, 90454, 100891, 103376, 107068, 115304, 147784, 180908, 187369, 201782, 214136, 230608, 295568, 361816, 374738, 403564, 428272, 723632, 749476, 807128, 1311583, 1498952, 1614256, 2623166, 2997904, 5246332, 10492664, 20985328]

約数ペア:

[(1, 20985328), (2, 10492664), (4, 5246332), (7, 2997904), (8, 2623166), (13, 1614256), (14, 1498952), (16, 1311583), (26, 807128), (28, 749476), (29, 723632), (49, 428272), (52, 403564), (56, 374738), (58, 361816), (71, 295568), (91, 230608), (98, 214136), (104, 201782), (112, 187369), (116, 180908), (142, 147784), (182, 115304), (196, 107068), (203, 103376), (208, 100891), (232, 90454), (284, 73892), (364, 57652), (377, 55664), (392, 53534), (406, 51688), (464, 45227), (497, 42224), (568, 36946), (637, 32944), (728, 28826), (754, 27832), (784, 26767), (812, 25844), (923, 22736), (994, 21112), (1136, 18473), (1274, 16472), (1421, 14768), (1456, 14413), (1508, 13916), (1624, 12922), (1846, 11368), (1988, 10556), (2059, 10192), (2548, 8236), (2639, 7952), (2842, 7384), (3016, 6958), (3248, 6461), (3479, 6032), (3692, 5684), (3976, 5278), (4118, 5096)]