21992815

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1531}}^1$

素因数の和:1579

約数の個数: 24

約数和(自身を含む): 30278448

約数和(自身を除く): 8285633

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 1531, 2873, 7655, 14365, 19903, 26027, 99515, 130135, 258739, 338351, 1293695, 1691755, 4398563, 21992815]

約数ペア:

[(1, 21992815), (5, 4398563), (13, 1691755), (17, 1293695), (65, 338351), (85, 258739), (169, 130135), (221, 99515), (845, 26027), (1105, 19903), (1531, 14365), (2873, 7655)]