21120645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15473}}^1$

素因数の和:15501

約数の個数: 32

約数和(自身を含む): 41594112

約数和(自身を除く): 20473467

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15473, 46419, 77365, 108311, 201149, 232095, 324933, 541555, 603447, 1005745, 1408043, 1624665, 3017235, 4224129, 7040215, 21120645]

約数ペア:

[(1, 21120645), (3, 7040215), (5, 4224129), (7, 3017235), (13, 1624665), (15, 1408043), (21, 1005745), (35, 603447), (39, 541555), (65, 324933), (91, 232095), (105, 201149), (195, 108311), (273, 77365), (455, 46419), (1365, 15473)]