20557397

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{419}}^1$

素因数の和:632

約数の個数: 16

約数和(自身を含む): 24245760

約数和(自身を除く): 3688363

約数列:

[1, 7, 43, 163, 301, 419, 1141, 2933, 7009, 18017, 49063, 68297, 126119, 478079, 2936771, 20557397]

約数ペア:

[(1, 20557397), (7, 2936771), (43, 478079), (163, 126119), (301, 68297), (419, 49063), (1141, 18017), (2933, 7009)]