21448271

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:171

約数の個数: 32

約数和(自身を含む): 26123328

約数和(自身を除く): 4675057

約数列:

[1, 13, 17, 37, 43, 61, 221, 481, 559, 629, 731, 793, 1037, 1591, 2257, 2623, 8177, 9503, 13481, 20683, 27047, 29341, 34099, 38369, 44591, 97051, 351611, 498797, 579683, 1261663, 1649867, 21448271]

約数ペア:

[(1, 21448271), (13, 1649867), (17, 1261663), (37, 579683), (43, 498797), (61, 351611), (221, 97051), (481, 44591), (559, 38369), (629, 34099), (731, 29341), (793, 27047), (1037, 20683), (1591, 13481), (2257, 9503), (2623, 8177)]