21066731

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{661}}^1$

素因数の和:854

約数の個数: 16

約数和(自身を含む): 25103040

約数和(自身を除く): 4036309

約数列:

[1, 7, 29, 157, 203, 661, 1099, 4553, 4627, 19169, 31871, 103777, 134183, 726439, 3009533, 21066731]

約数ペア:

[(1, 21066731), (7, 3009533), (29, 726439), (157, 134183), (203, 103777), (661, 31871), (1099, 19169), (4553, 4627)]