21691397

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{683}}^1$

素因数の和:1052

約数の個数: 16

約数和(自身を含む): 26812800

約数和(自身を除く): 5121403

約数列:

[1, 7, 13, 91, 349, 683, 2443, 4537, 4781, 8879, 31759, 62153, 238367, 1668569, 3098771, 21691397]

約数ペア:

[(1, 21691397), (7, 3098771), (13, 1668569), (91, 238367), (349, 62153), (683, 31759), (2443, 8879), (4537, 4781)]