21509804

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{1583}}^1$

素因数の和:1709

約数の個数: 24

約数和(自身を含む): 39029760

約数和(自身を除く): 17519956

約数列:

[1, 2, 4, 43, 79, 86, 158, 172, 316, 1583, 3166, 3397, 6332, 6794, 13588, 68069, 125057, 136138, 250114, 272276, 500228, 5377451, 10754902, 21509804]

約数ペア:

[(1, 21509804), (2, 10754902), (4, 5377451), (43, 500228), (79, 272276), (86, 250114), (158, 136138), (172, 125057), (316, 68069), (1583, 13588), (3166, 6794), (3397, 6332)]