21161335

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{317}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 27933120

約数和(自身を除く): 6771785

約数列:

[1, 5, 13, 65, 79, 169, 317, 395, 845, 1027, 1585, 4121, 5135, 13351, 20605, 25043, 53573, 66755, 125215, 267865, 325559, 1627795, 4232267, 21161335]

約数ペア:

[(1, 21161335), (5, 4232267), (13, 1627795), (65, 325559), (79, 267865), (169, 125215), (317, 66755), (395, 53573), (845, 25043), (1027, 20605), (1585, 13351), (4121, 5135)]