21268828

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{39979}}^1$

素因数の和:40009

約数の個数: 24

約数和(自身を含む): 44777600

約数和(自身を除く): 23508772

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 39979, 79958, 159916, 279853, 559706, 759601, 1119412, 1519202, 3038404, 5317207, 10634414, 21268828]

約数ペア:

[(1, 21268828), (2, 10634414), (4, 5317207), (7, 3038404), (14, 1519202), (19, 1119412), (28, 759601), (38, 559706), (76, 279853), (133, 159916), (266, 79958), (532, 39979)]