21189519

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20123}}^1$

素因数の和:20148

約数の個数: 20

約数和(自身を含む): 34090056

約数和(自身を除く): 12900537

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20123, 60369, 181107, 261599, 543321, 784797, 1629963, 2354391, 7063173, 21189519]

約数ペア:

[(1, 21189519), (3, 7063173), (9, 2354391), (13, 1629963), (27, 784797), (39, 543321), (81, 261599), (117, 181107), (351, 60369), (1053, 20123)]