21612253

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{5147}}^1$

素因数の和:5196

約数の個数: 16

約数和(自身を含む): 25945920

約数和(自身を除く): 4333667

約数列:

[1, 13, 17, 19, 221, 247, 323, 4199, 5147, 66911, 87499, 97793, 1137487, 1271309, 1662481, 21612253]

約数ペア:

[(1, 21612253), (13, 1662481), (17, 1271309), (19, 1137487), (221, 97793), (247, 87499), (323, 66911), (4199, 5147)]