21358161

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{23971}}^1$

素因数の和:23994

約数の個数: 20

約数和(自身を含む): 34807344

約数和(自身を除く): 13449183

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 23971, 71913, 215739, 263681, 647217, 791043, 1941651, 2373129, 7119387, 21358161]

約数ペア:

[(1, 21358161), (3, 7119387), (9, 2373129), (11, 1941651), (27, 791043), (33, 647217), (81, 263681), (99, 215739), (297, 71913), (891, 23971)]