21959399

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{311}}^1$

素因数の和:467

約数の個数: 24

約数和(自身を含む): 28169856

約数和(自身を除く): 6210457

約数列:

[1, 7, 11, 49, 77, 131, 311, 539, 917, 1441, 2177, 3421, 6419, 10087, 15239, 23947, 40741, 70609, 167629, 285187, 448151, 1996309, 3137057, 21959399]

約数ペア:

[(1, 21959399), (7, 3137057), (11, 1996309), (49, 448151), (77, 285187), (131, 167629), (311, 70609), (539, 40741), (917, 23947), (1441, 15239), (2177, 10087), (3421, 6419)]