21188784239

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{239}}^1\times {\mathrm{408553}}^1$

素因数の和:408830

約数の個数: 16

約数和(自身を含む): 25101557760

約数和(自身を除く): 3912773521

約数列:

[1, 7, 31, 217, 239, 1673, 7409, 51863, 408553, 2859871, 12665143, 88656001, 97644167, 683509169, 3026969177, 21188784239]

約数ペア:

[(1, 21188784239), (7, 3026969177), (31, 683509169), (217, 97644167), (239, 88656001), (1673, 12665143), (7409, 2859871), (51863, 408553)]