20991432

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{307}}^1$

素因数の和:371

約数の個数: 128

約数和(自身を含む): 67415040

約数和(自身を除く): 46423608

約数列:

[1, 2, 3, 4, 6, 7, 8, 11, 12, 14, 21, 22, 24, 28, 33, 37, 42, 44, 56, 66, 74, 77, 84, 88, 111, 132, 148, 154, 168, 222, 231, 259, 264, 296, 307, 308, 407, 444, 462, 518, 614, 616, 777, 814, 888, 921, 924, 1036, 1221, 1228, 1554, 1628, 1842, 1848, 2072, 2149, 2442, 2456, 2849, 3108, 3256, 3377, 3684, 4298, 4884, 5698, 6216, 6447, 6754, 7368, 8547, 8596, 9768, 10131, 11359, 11396, 12894, 13508, 17094, 17192, 20262, 22718, 22792, 23639, 25788, 27016, 34077, 34188, 40524, 45436, 47278, 51576, 68154, 68376, 70917, 79513, 81048, 90872, 94556, 124949, 136308, 141834, 159026, 189112, 238539, 249898, 272616, 283668, 318052, 374847, 477078, 499796, 567336, 636104, 749694, 874643, 954156, 999592, 1499388, 1749286, 1908312, 2623929, 2998776, 3498572, 5247858, 6997144, 10495716, 20991432]

約数ペア:

[(1, 20991432), (2, 10495716), (3, 6997144), (4, 5247858), (6, 3498572), (7, 2998776), (8, 2623929), (11, 1908312), (12, 1749286), (14, 1499388), (21, 999592), (22, 954156), (24, 874643), (28, 749694), (33, 636104), (37, 567336), (42, 499796), (44, 477078), (56, 374847), (66, 318052), (74, 283668), (77, 272616), (84, 249898), (88, 238539), (111, 189112), (132, 159026), (148, 141834), (154, 136308), (168, 124949), (222, 94556), (231, 90872), (259, 81048), (264, 79513), (296, 70917), (307, 68376), (308, 68154), (407, 51576), (444, 47278), (462, 45436), (518, 40524), (614, 34188), (616, 34077), (777, 27016), (814, 25788), (888, 23639), (921, 22792), (924, 22718), (1036, 20262), (1221, 17192), (1228, 17094), (1554, 13508), (1628, 12894), (1842, 11396), (1848, 11359), (2072, 10131), (2149, 9768), (2442, 8596), (2456, 8547), (2849, 7368), (3108, 6754), (3256, 6447), (3377, 6216), (3684, 5698), (4298, 4884)]