20781275

素因数分解:

$5^2\times {\mathrm{59}}^1\times {\mathrm{73}}^1\times {\mathrm{193}}^1$

素因数の和:335

約数の個数: 24

約数和(自身を含む): 26702160

約数和(自身を除く): 5920885

約数列:

[1, 5, 25, 59, 73, 193, 295, 365, 965, 1475, 1825, 4307, 4825, 11387, 14089, 21535, 56935, 70445, 107675, 284675, 352225, 831251, 4156255, 20781275]

約数ペア:

[(1, 20781275), (5, 4156255), (25, 831251), (59, 352225), (73, 284675), (193, 107675), (295, 70445), (365, 56935), (965, 21535), (1475, 14089), (1825, 11387), (4307, 4825)]