21807149

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5573}}^1$

素因数の和:5636

約数の個数: 16

約数和(自身を含む): 27468672

約数和(自身を除く): 5661523

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5573, 39011, 72449, 239639, 507143, 1677473, 3115307, 21807149]

約数ペア:

[(1, 21807149), (7, 3115307), (13, 1677473), (43, 507143), (91, 239639), (301, 72449), (559, 39011), (3913, 5573)]