21212631

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:225

約数の個数: 48

約数和(自身を含む): 35580160

約数和(自身を除く): 14367529

約数列:

[1, 3, 9, 11, 27, 33, 43, 99, 121, 129, 151, 297, 363, 387, 453, 473, 1089, 1161, 1359, 1419, 1661, 3267, 4077, 4257, 4983, 5203, 6493, 12771, 14949, 15609, 18271, 19479, 44847, 46827, 54813, 58437, 71423, 140481, 164439, 175311, 214269, 493317, 642807, 785653, 1928421, 2356959, 7070877, 21212631]

約数ペア:

[(1, 21212631), (3, 7070877), (9, 2356959), (11, 1928421), (27, 785653), (33, 642807), (43, 493317), (99, 214269), (121, 175311), (129, 164439), (151, 140481), (297, 71423), (363, 58437), (387, 54813), (453, 46827), (473, 44847), (1089, 19479), (1161, 18271), (1359, 15609), (1419, 14949), (1661, 12771), (3267, 6493), (4077, 5203), (4257, 4983)]