21857828

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{15137}}^1$

素因数の和:15179

約数の個数: 18

約数和(自身を含む): 40373046

約数和(自身を除く): 18515218

約数列:

[1, 2, 4, 19, 38, 76, 361, 722, 1444, 15137, 30274, 60548, 287603, 575206, 1150412, 5464457, 10928914, 21857828]

約数ペア:

[(1, 21857828), (2, 10928914), (4, 5464457), (19, 1150412), (38, 575206), (76, 287603), (361, 60548), (722, 30274), (1444, 15137)]