21855309

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{24203}}^1$

素因数の和:24256

約数の個数: 16

約数和(自身を含む): 34079232

約数和(自身を除く): 12223923

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 24203, 72609, 169421, 508263, 1040729, 3122187, 7285103, 21855309]

約数ペア:

[(1, 21855309), (3, 7285103), (7, 3122187), (21, 1040729), (43, 508263), (129, 169421), (301, 72609), (903, 24203)]