20688408

素因数分解:

$2^3\times 3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:110

約数の個数: 144

約数和(自身を含む): 65061360

約数和(自身を除く): 44372952

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 23, 24, 26, 31, 36, 39, 46, 52, 62, 69, 72, 78, 92, 93, 104, 117, 124, 138, 156, 184, 186, 207, 234, 248, 276, 279, 299, 312, 372, 403, 414, 468, 552, 558, 598, 713, 744, 806, 828, 897, 936, 961, 1116, 1196, 1209, 1426, 1612, 1656, 1794, 1922, 2139, 2232, 2392, 2418, 2691, 2852, 2883, 3224, 3588, 3627, 3844, 4278, 4836, 5382, 5704, 5766, 6417, 7176, 7254, 7688, 8556, 8649, 9269, 9672, 10764, 11532, 12493, 12834, 14508, 17112, 17298, 18538, 21528, 22103, 23064, 24986, 25668, 27807, 29016, 34596, 37076, 37479, 44206, 49972, 51336, 55614, 66309, 69192, 74152, 74958, 83421, 88412, 99944, 111228, 112437, 132618, 149916, 166842, 176824, 198927, 222456, 224874, 265236, 287339, 299832, 333684, 397854, 449748, 530472, 574678, 667368, 795708, 862017, 899496, 1149356, 1591416, 1724034, 2298712, 2586051, 3448068, 5172102, 6896136, 10344204, 20688408]

約数ペア:

[(1, 20688408), (2, 10344204), (3, 6896136), (4, 5172102), (6, 3448068), (8, 2586051), (9, 2298712), (12, 1724034), (13, 1591416), (18, 1149356), (23, 899496), (24, 862017), (26, 795708), (31, 667368), (36, 574678), (39, 530472), (46, 449748), (52, 397854), (62, 333684), (69, 299832), (72, 287339), (78, 265236), (92, 224874), (93, 222456), (104, 198927), (117, 176824), (124, 166842), (138, 149916), (156, 132618), (184, 112437), (186, 111228), (207, 99944), (234, 88412), (248, 83421), (276, 74958), (279, 74152), (299, 69192), (312, 66309), (372, 55614), (403, 51336), (414, 49972), (468, 44206), (552, 37479), (558, 37076), (598, 34596), (713, 29016), (744, 27807), (806, 25668), (828, 24986), (897, 23064), (936, 22103), (961, 21528), (1116, 18538), (1196, 17298), (1209, 17112), (1426, 14508), (1612, 12834), (1656, 12493), (1794, 11532), (1922, 10764), (2139, 9672), (2232, 9269), (2392, 8649), (2418, 8556), (2691, 7688), (2852, 7254), (2883, 7176), (3224, 6417), (3588, 5766), (3627, 5704), (3844, 5382), (4278, 4836)]