21257733

素因数分解:

$3^1\times 7^1\times {\mathrm{733}}^1\times {\mathrm{1381}}^1$

素因数の和:2124

約数の個数: 16

約数和(自身を含む): 32460416

約数和(自身を除く): 11202683

約数列:

[1, 3, 7, 21, 733, 1381, 2199, 4143, 5131, 9667, 15393, 29001, 1012273, 3036819, 7085911, 21257733]

約数ペア:

[(1, 21257733), (3, 7085911), (7, 3036819), (21, 1012273), (733, 29001), (1381, 15393), (2199, 9667), (4143, 5131)]