12991231

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1019}}^1$

素因数の和:1110

約数の個数: 16

約数和(自身を含む): 15177600

約数和(自身を除く): 2186369

約数列:

[1, 11, 19, 61, 209, 671, 1019, 1159, 11209, 12749, 19361, 62159, 212971, 683749, 1181021, 12991231]

約数ペア:

[(1, 12991231), (11, 1181021), (19, 683749), (61, 212971), (209, 62159), (671, 19361), (1019, 12749), (1159, 11209)]