21187491

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31957}}^1$

素因数の和:31990

約数の個数: 16

約数和(自身を含む): 32213664

約数和(自身を除く): 11026173

約数列:

[1, 3, 13, 17, 39, 51, 221, 663, 31957, 95871, 415441, 543269, 1246323, 1629807, 7062497, 21187491]

約数ペア:

[(1, 21187491), (3, 7062497), (13, 1629807), (17, 1246323), (39, 543269), (51, 415441), (221, 95871), (663, 31957)]