21457731

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{919}}^1$

素因数の和:1146

約数の個数: 16

約数和(自身を含む): 29469440

約数和(自身を除く): 8011709

約数列:

[1, 3, 43, 129, 181, 543, 919, 2757, 7783, 23349, 39517, 118551, 166339, 499017, 7152577, 21457731]

約数ペア:

[(1, 21457731), (3, 7152577), (43, 499017), (129, 166339), (181, 118551), (543, 39517), (919, 23349), (2757, 7783)]