21219231

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{13681}}^1$

素因数の和:13742

約数の個数: 16

約数和(自身を含む): 31523328

約数和(自身を除く): 10304097

約数列:

[1, 3, 11, 33, 47, 141, 517, 1551, 13681, 41043, 150491, 451473, 643007, 1929021, 7073077, 21219231]

約数ペア:

[(1, 21219231), (3, 7073077), (11, 1929021), (33, 643007), (47, 451473), (141, 150491), (517, 41043), (1551, 13681)]