20881209

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{9901}}^1$

素因数の和:9960

約数の個数: 16

約数和(自身を含む): 30102080

約数和(自身を除く): 9220871

約数列:

[1, 3, 19, 37, 57, 111, 703, 2109, 9901, 29703, 188119, 366337, 564357, 1099011, 6960403, 20881209]

約数ペア:

[(1, 20881209), (3, 6960403), (19, 1099011), (37, 564357), (57, 366337), (111, 188119), (703, 29703), (2109, 9901)]