20688272

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:168

約数の個数: 80

約数和(自身を含む): 46497024

約数和(自身を除く): 25808752

約数列:

[1, 2, 4, 8, 11, 16, 22, 41, 44, 47, 61, 82, 88, 94, 122, 164, 176, 188, 244, 328, 376, 451, 488, 517, 656, 671, 752, 902, 976, 1034, 1342, 1804, 1927, 2068, 2501, 2684, 2867, 3608, 3854, 4136, 5002, 5368, 5734, 7216, 7708, 8272, 10004, 10736, 11468, 15416, 20008, 21197, 22936, 27511, 30832, 31537, 40016, 42394, 45872, 55022, 63074, 84788, 110044, 117547, 126148, 169576, 220088, 235094, 252296, 339152, 440176, 470188, 504592, 940376, 1293017, 1880752, 2586034, 5172068, 10344136, 20688272]

約数ペア:

[(1, 20688272), (2, 10344136), (4, 5172068), (8, 2586034), (11, 1880752), (16, 1293017), (22, 940376), (41, 504592), (44, 470188), (47, 440176), (61, 339152), (82, 252296), (88, 235094), (94, 220088), (122, 169576), (164, 126148), (176, 117547), (188, 110044), (244, 84788), (328, 63074), (376, 55022), (451, 45872), (488, 42394), (517, 40016), (656, 31537), (671, 30832), (752, 27511), (902, 22936), (976, 21197), (1034, 20008), (1342, 15416), (1804, 11468), (1927, 10736), (2068, 10004), (2501, 8272), (2684, 7708), (2867, 7216), (3608, 5734), (3854, 5368), (4136, 5002)]