21891260

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4259}}^1$

素因数の和:4525

約数の個数: 24

約数和(自身を含む): 46161360

約数和(自身を除く): 24270100

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4259, 5140, 8518, 17036, 21295, 42590, 85180, 1094563, 2189126, 4378252, 5472815, 10945630, 21891260]

約数ペア:

[(1, 21891260), (2, 10945630), (4, 5472815), (5, 4378252), (10, 2189126), (20, 1094563), (257, 85180), (514, 42590), (1028, 21295), (1285, 17036), (2570, 8518), (4259, 5140)]