21504847

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{13901}}^1$

素因数の和:13938

約数の個数: 16

約数和(自身を含む): 28026432

約数和(自身を除く): 6521585

約数列:

[1, 7, 13, 17, 91, 119, 221, 1547, 13901, 97307, 180713, 236317, 1264991, 1654219, 3072121, 21504847]

約数ペア:

[(1, 21504847), (7, 3072121), (13, 1654219), (17, 1264991), (91, 236317), (119, 180713), (221, 97307), (1547, 13901)]