21188391

素因数分解:

$3^1\times 7^1\times {\mathrm{431}}^1\times {\mathrm{2341}}^1$

素因数の和:2782

約数の個数: 16

約数和(自身を含む): 32375808

約数和(自身を除く): 11187417

約数列:

[1, 3, 7, 21, 431, 1293, 2341, 3017, 7023, 9051, 16387, 49161, 1008971, 3026913, 7062797, 21188391]

約数ペア:

[(1, 21188391), (3, 7062797), (7, 3026913), (21, 1008971), (431, 49161), (1293, 16387), (2341, 9051), (3017, 7023)]