19905689

素因数分解:

${\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:320

約数の個数: 16

約数和(自身を含む): 21373440

約数和(自身を除く): 1467751

約数列:

[1, 31, 43, 109, 137, 1333, 3379, 4247, 4687, 5891, 14933, 145297, 182621, 462923, 642119, 19905689]

約数ペア:

[(1, 19905689), (31, 642119), (43, 462923), (109, 182621), (137, 145297), (1333, 14933), (3379, 5891), (4247, 4687)]