19749665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{293}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 27560736

約数和(自身を除く): 7811071

約数列:

[1, 5, 13, 17, 61, 65, 85, 221, 293, 305, 793, 1037, 1105, 1465, 3809, 3965, 4981, 5185, 13481, 17873, 19045, 24905, 64753, 67405, 89365, 232349, 303841, 323765, 1161745, 1519205, 3949933, 19749665]

約数ペア:

[(1, 19749665), (5, 3949933), (13, 1519205), (17, 1161745), (61, 323765), (65, 303841), (85, 232349), (221, 89365), (293, 67405), (305, 64753), (793, 24905), (1037, 19045), (1105, 17873), (1465, 13481), (3809, 5185), (3965, 4981)]