20871865

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{5471}}^1$

素因数の和:5592

約数の個数: 16

約数和(自身を含む): 28892160

約数和(自身を除く): 8020295

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 5471, 27355, 38297, 191485, 596339, 2981695, 4174373, 20871865]

約数ペア:

[(1, 20871865), (5, 4174373), (7, 2981695), (35, 596339), (109, 191485), (545, 38297), (763, 27355), (3815, 5471)]