21105909

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19381}}^1$

素因数の和:19409

約数の個数: 18

約数和(自身を含む): 33511478

約数和(自身を除く): 12405569

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19381, 58143, 174429, 213191, 639573, 1918719, 2345101, 7035303, 21105909]

約数ペア:

[(1, 21105909), (3, 7035303), (9, 2345101), (11, 1918719), (33, 639573), (99, 213191), (121, 174429), (363, 58143), (1089, 19381)]