21288891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{541}}^1\times {\mathrm{1009}}^1$

素因数の和:1566

約数の個数: 16

約数和(自身を含む): 30655520

約数和(自身を除く): 9366629

約数列:

[1, 3, 13, 39, 541, 1009, 1623, 3027, 7033, 13117, 21099, 39351, 545869, 1637607, 7096297, 21288891]

約数ペア:

[(1, 21288891), (3, 7096297), (13, 1637607), (39, 545869), (541, 39351), (1009, 21099), (1623, 13117), (3027, 7033)]