19957217

素因数分解:

$7^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1\times {\mathrm{239}}^1$

素因数の和:476

約数の個数: 16

約数和(自身を含む): 23347200

約数和(自身を除く): 3389983

約数列:

[1, 7, 79, 151, 239, 553, 1057, 1673, 11929, 18881, 36089, 83503, 132167, 252623, 2851031, 19957217]

約数ペア:

[(1, 19957217), (7, 2851031), (79, 252623), (151, 132167), (239, 83503), (553, 36089), (1057, 18881), (1673, 11929)]