21198265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12433}}^1$

素因数の和:12480

約数の個数: 16

約数和(自身を含む): 28647936

約数和(自身を除く): 7449671

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12433, 62165, 136763, 385423, 683815, 1927115, 4239653, 21198265]

約数ペア:

[(1, 21198265), (5, 4239653), (11, 1927115), (31, 683815), (55, 385423), (155, 136763), (341, 62165), (1705, 12433)]