20178891

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1$

素因数の和:467

約数の個数: 24

約数和(自身を含む): 29914560

約数和(自身を除く): 9735669

約数列:

[1, 3, 9, 79, 101, 237, 281, 303, 711, 843, 909, 2529, 7979, 22199, 23937, 28381, 66597, 71811, 85143, 199791, 255429, 2242099, 6726297, 20178891]

約数ペア:

[(1, 20178891), (3, 6726297), (9, 2242099), (79, 255429), (101, 199791), (237, 85143), (281, 71811), (303, 66597), (711, 28381), (843, 23937), (909, 22199), (2529, 7979)]