21120307

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{227}}^1\times {\mathrm{421}}^1$

素因数の和:678

約数の個数: 16

約数和(自身を含む): 24246432

約数和(自身を除く): 3126125

約数列:

[1, 13, 17, 221, 227, 421, 2951, 3859, 5473, 7157, 50167, 93041, 95567, 1242371, 1624639, 21120307]

約数ペア:

[(1, 21120307), (13, 1624639), (17, 1242371), (221, 95567), (227, 93041), (421, 50167), (2951, 7157), (3859, 5473)]