20828913

素因数分解:

$3^1\times 7^1\times {\mathrm{811}}^1\times {\mathrm{1223}}^1$

素因数の和:2044

約数の個数: 16

約数和(自身を含む): 31804416

約数和(自身を除く): 10975503

約数列:

[1, 3, 7, 21, 811, 1223, 2433, 3669, 5677, 8561, 17031, 25683, 991853, 2975559, 6942971, 20828913]

約数ペア:

[(1, 20828913), (3, 6942971), (7, 2975559), (21, 991853), (811, 25683), (1223, 17031), (2433, 8561), (3669, 5677)]