221221

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1$

素因数の和:61

約数の個数: 24

約数和(自身を含む): 316224

約数和(自身を除く): 95003

約数列:

[1, 7, 11, 13, 17, 77, 91, 119, 143, 169, 187, 221, 1001, 1183, 1309, 1547, 1859, 2431, 2873, 13013, 17017, 20111, 31603, 221221]

約数ペア:

[(1, 221221), (7, 31603), (11, 20111), (13, 17017), (17, 13013), (77, 2873), (91, 2431), (119, 1859), (143, 1547), (169, 1309), (187, 1183), (221, 1001)]