21750819

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{1637}}^1$

素因数の和:1786

約数の個数: 16

約数和(自身を含む): 29981952

約数和(自身を除く): 8231133

約数列:

[1, 3, 43, 103, 129, 309, 1637, 4429, 4911, 13287, 70391, 168611, 211173, 505833, 7250273, 21750819]

約数ペア:

[(1, 21750819), (3, 7250273), (43, 505833), (103, 211173), (129, 168611), (309, 70391), (1637, 13287), (4429, 4911)]