21018459

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90989}}^1$

素因数の和:91010

約数の個数: 16

約数和(自身を含む): 34940160

約数和(自身を除く): 13921701

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90989, 272967, 636923, 1000879, 1910769, 3002637, 7006153, 21018459]

約数ペア:

[(1, 21018459), (3, 7006153), (7, 3002637), (11, 1910769), (21, 1000879), (33, 636923), (77, 272967), (231, 90989)]