20421555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17681}}^1$

素因数の和:17707

約数の個数: 32

約数和(自身を含む): 40739328

約数和(自身を除く): 20317773

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 17681, 53043, 88405, 123767, 194491, 265215, 371301, 583473, 618835, 972455, 1361437, 1856505, 2917365, 4084311, 6807185, 20421555]

約数ペア:

[(1, 20421555), (3, 6807185), (5, 4084311), (7, 2917365), (11, 1856505), (15, 1361437), (21, 972455), (33, 618835), (35, 583473), (55, 371301), (77, 265215), (105, 194491), (165, 123767), (231, 88405), (385, 53043), (1155, 17681)]