21981740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2437}}^1$

素因数の和:2498

約数の個数: 48

約数和(自身を含む): 51607584

約数和(自身を除く): 29625844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2437, 4510, 4874, 9020, 9748, 12185, 24370, 26807, 48740, 53614, 99917, 107228, 134035, 199834, 268070, 399668, 499585, 536140, 999170, 1099087, 1998340, 2198174, 4396348, 5495435, 10990870, 21981740]

約数ペア:

[(1, 21981740), (2, 10990870), (4, 5495435), (5, 4396348), (10, 2198174), (11, 1998340), (20, 1099087), (22, 999170), (41, 536140), (44, 499585), (55, 399668), (82, 268070), (110, 199834), (164, 134035), (205, 107228), (220, 99917), (410, 53614), (451, 48740), (820, 26807), (902, 24370), (1804, 12185), (2255, 9748), (2437, 9020), (4510, 4874)]