18709957

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{571}}^1$

素因数の和:760

約数の個数: 16

約数和(自身を含む): 22257664

約数和(自身を除く): 3547707

約数列:

[1, 7, 31, 151, 217, 571, 1057, 3997, 4681, 17701, 32767, 86221, 123907, 603547, 2672851, 18709957]

約数ペア:

[(1, 18709957), (7, 2672851), (31, 603547), (151, 123907), (217, 86221), (571, 32767), (1057, 17701), (3997, 4681)]