20940568

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 44997120

約数和(自身を除く): 24056552

約数列:

[1, 2, 4, 8, 11, 22, 44, 47, 61, 83, 88, 94, 122, 166, 188, 244, 332, 376, 488, 517, 664, 671, 913, 1034, 1342, 1826, 2068, 2684, 2867, 3652, 3901, 4136, 5063, 5368, 5734, 7304, 7802, 10126, 11468, 15604, 20252, 22936, 31208, 31537, 40504, 42911, 55693, 63074, 85822, 111386, 126148, 171644, 222772, 237961, 252296, 343288, 445544, 475922, 951844, 1903688, 2617571, 5235142, 10470284, 20940568]

約数ペア:

[(1, 20940568), (2, 10470284), (4, 5235142), (8, 2617571), (11, 1903688), (22, 951844), (44, 475922), (47, 445544), (61, 343288), (83, 252296), (88, 237961), (94, 222772), (122, 171644), (166, 126148), (188, 111386), (244, 85822), (332, 63074), (376, 55693), (488, 42911), (517, 40504), (664, 31537), (671, 31208), (913, 22936), (1034, 20252), (1342, 15604), (1826, 11468), (2068, 10126), (2684, 7802), (2867, 7304), (3652, 5734), (3901, 5368), (4136, 5063)]