21478886

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:201

約数の個数: 48

約数和(自身を含む): 39132720

約数和(自身を除く): 17653834

約数列:

[1, 2, 11, 13, 22, 26, 53, 106, 109, 143, 169, 218, 286, 338, 583, 689, 1166, 1199, 1378, 1417, 1859, 2398, 2834, 3718, 5777, 7579, 8957, 11554, 15158, 15587, 17914, 18421, 31174, 36842, 63547, 75101, 98527, 127094, 150202, 197054, 202631, 405262, 826111, 976313, 1652222, 1952626, 10739443, 21478886]

約数ペア:

[(1, 21478886), (2, 10739443), (11, 1952626), (13, 1652222), (22, 976313), (26, 826111), (53, 405262), (106, 202631), (109, 197054), (143, 150202), (169, 127094), (218, 98527), (286, 75101), (338, 63547), (583, 36842), (689, 31174), (1166, 18421), (1199, 17914), (1378, 15587), (1417, 15158), (1859, 11554), (2398, 8957), (2834, 7579), (3718, 5777)]