21319311

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28771}}^1$

素因数の和:28806

約数の個数: 16

約数和(自身を含む): 32224640

約数和(自身を除く): 10905329

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28771, 86313, 374023, 546649, 1122069, 1639947, 7106437, 21319311]

約数ペア:

[(1, 21319311), (3, 7106437), (13, 1639947), (19, 1122069), (39, 546649), (57, 374023), (247, 86313), (741, 28771)]