21256345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20341}}^1$

素因数の和:20376

約数の個数: 16

約数和(自身を含む): 29292480

約数和(自身を除く): 8036135

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20341, 101705, 223751, 386479, 1118755, 1932395, 4251269, 21256345]

約数ペア:

[(1, 21256345), (5, 4251269), (11, 1932395), (19, 1118755), (55, 386479), (95, 223751), (209, 101705), (1045, 20341)]