18418840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1021}}^1$

素因数の和:1084

約数の個数: 64

約数和(自身を含む): 46357920

約数和(自身を除く): 27939080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1021, 1640, 1804, 2042, 2255, 3608, 4084, 4510, 5105, 8168, 9020, 10210, 11231, 18040, 20420, 22462, 40840, 41861, 44924, 56155, 83722, 89848, 112310, 167444, 209305, 224620, 334888, 418610, 449240, 460471, 837220, 920942, 1674440, 1841884, 2302355, 3683768, 4604710, 9209420, 18418840]

約数ペア:

[(1, 18418840), (2, 9209420), (4, 4604710), (5, 3683768), (8, 2302355), (10, 1841884), (11, 1674440), (20, 920942), (22, 837220), (40, 460471), (41, 449240), (44, 418610), (55, 334888), (82, 224620), (88, 209305), (110, 167444), (164, 112310), (205, 89848), (220, 83722), (328, 56155), (410, 44924), (440, 41861), (451, 40840), (820, 22462), (902, 20420), (1021, 18040), (1640, 11231), (1804, 10210), (2042, 9020), (2255, 8168), (3608, 5105), (4084, 4510)]