21806505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1871}}^1$

素因数の和:1926

約数の個数: 48

約数和(自身を含む): 44388864

約数和(自身を除く): 22582359

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 63, 105, 111, 185, 259, 315, 333, 555, 777, 1295, 1665, 1871, 2331, 3885, 5613, 9355, 11655, 13097, 16839, 28065, 39291, 65485, 69227, 84195, 117873, 196455, 207681, 346135, 484589, 589365, 623043, 1038405, 1453767, 2422945, 3115215, 4361301, 7268835, 21806505]

約数ペア:

[(1, 21806505), (3, 7268835), (5, 4361301), (7, 3115215), (9, 2422945), (15, 1453767), (21, 1038405), (35, 623043), (37, 589365), (45, 484589), (63, 346135), (105, 207681), (111, 196455), (185, 117873), (259, 84195), (315, 69227), (333, 65485), (555, 39291), (777, 28065), (1295, 16839), (1665, 13097), (1871, 11655), (2331, 9355), (3885, 5613)]