19665005

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{439}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 25935360

約数和(自身を除く): 6270355

約数列:

[1, 5, 17, 31, 85, 155, 289, 439, 527, 1445, 2195, 2635, 7463, 8959, 13609, 37315, 44795, 68045, 126871, 231353, 634355, 1156765, 3933001, 19665005]

約数ペア:

[(1, 19665005), (5, 3933001), (17, 1156765), (31, 634355), (85, 231353), (155, 126871), (289, 68045), (439, 44795), (527, 37315), (1445, 13609), (2195, 8959), (2635, 7463)]