20985734

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 21039226

約数列:

[1, 2, 7, 11, 14, 22, 29, 37, 58, 74, 77, 127, 154, 203, 254, 259, 319, 406, 407, 518, 638, 814, 889, 1073, 1397, 1778, 2146, 2233, 2794, 2849, 3683, 4466, 4699, 5698, 7366, 7511, 9398, 9779, 11803, 15022, 19558, 23606, 25781, 32893, 40513, 51562, 51689, 65786, 81026, 82621, 103378, 136271, 165242, 272542, 283591, 361823, 567182, 723646, 953897, 1498981, 1907794, 2997962, 10492867, 20985734]

約数ペア:

[(1, 20985734), (2, 10492867), (7, 2997962), (11, 1907794), (14, 1498981), (22, 953897), (29, 723646), (37, 567182), (58, 361823), (74, 283591), (77, 272542), (127, 165242), (154, 136271), (203, 103378), (254, 82621), (259, 81026), (319, 65786), (406, 51689), (407, 51562), (518, 40513), (638, 32893), (814, 25781), (889, 23606), (1073, 19558), (1397, 15022), (1778, 11803), (2146, 9779), (2233, 9398), (2794, 7511), (2849, 7366), (3683, 5698), (4466, 4699)]