21977605

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{839}}^1$

素因数の和:901

約数の個数: 24

約数和(自身を含む): 29514240

約数和(自身を除く): 7536635

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 839, 845, 2015, 4195, 5239, 10907, 26009, 26195, 54535, 130045, 141791, 338117, 708955, 1690585, 4395521, 21977605]

約数ペア:

[(1, 21977605), (5, 4395521), (13, 1690585), (31, 708955), (65, 338117), (155, 141791), (169, 130045), (403, 54535), (839, 26195), (845, 26009), (2015, 10907), (4195, 5239)]