20006721

素因数分解:

$3^2\times 7^1\times {\mathrm{541}}^1\times {\mathrm{587}}^1$

素因数の和:1141

約数の個数: 24

約数和(自身を含む): 33144384

約数和(自身を除く): 13137663

約数列:

[1, 3, 7, 9, 21, 63, 541, 587, 1623, 1761, 3787, 4109, 4869, 5283, 11361, 12327, 34083, 36981, 317567, 952701, 2222969, 2858103, 6668907, 20006721]

約数ペア:

[(1, 20006721), (3, 6668907), (7, 2858103), (9, 2222969), (21, 952701), (63, 317567), (541, 36981), (587, 34083), (1623, 12327), (1761, 11361), (3787, 5283), (4109, 4869)]