21155288

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{563}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 50353920

約数和(自身を除く): 29198632

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 61, 77, 88, 122, 154, 244, 308, 427, 488, 563, 616, 671, 854, 1126, 1342, 1708, 2252, 2684, 3416, 3941, 4504, 4697, 5368, 6193, 7882, 9394, 12386, 15764, 18788, 24772, 31528, 34343, 37576, 43351, 49544, 68686, 86702, 137372, 173404, 240401, 274744, 346808, 377773, 480802, 755546, 961604, 1511092, 1923208, 2644411, 3022184, 5288822, 10577644, 21155288]

約数ペア:

[(1, 21155288), (2, 10577644), (4, 5288822), (7, 3022184), (8, 2644411), (11, 1923208), (14, 1511092), (22, 961604), (28, 755546), (44, 480802), (56, 377773), (61, 346808), (77, 274744), (88, 240401), (122, 173404), (154, 137372), (244, 86702), (308, 68686), (427, 49544), (488, 43351), (563, 37576), (616, 34343), (671, 31528), (854, 24772), (1126, 18788), (1342, 15764), (1708, 12386), (2252, 9394), (2684, 7882), (3416, 6193), (3941, 5368), (4504, 4697)]