20464689

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 32338944

約数和(自身を除く): 11874255

約数列:

[1, 3, 7, 21, 43, 129, 131, 173, 301, 393, 519, 903, 917, 1211, 2751, 3633, 5633, 7439, 16899, 22317, 22663, 39431, 52073, 67989, 118293, 156219, 158641, 475923, 974509, 2923527, 6821563, 20464689]

約数ペア:

[(1, 20464689), (3, 6821563), (7, 2923527), (21, 974509), (43, 475923), (129, 158641), (131, 156219), (173, 118293), (301, 67989), (393, 52073), (519, 39431), (903, 22663), (917, 22317), (1211, 16899), (2751, 7439), (3633, 5633)]