21361821

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17669}}^1$

素因数の和:17716

約数の個数: 16

約数和(自身を含む): 31664640

約数和(自身を除く): 10302819

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17669, 53007, 229697, 547739, 689091, 1643217, 7120607, 21361821]

約数ペア:

[(1, 21361821), (3, 7120607), (13, 1643217), (31, 689091), (39, 547739), (93, 229697), (403, 53007), (1209, 17669)]