20217239

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{617}}^1$

素因数の和:806

約数の個数: 16

約数和(自身を含む): 24047616

約数和(自身を除く): 3830377

約数列:

[1, 7, 31, 151, 217, 617, 1057, 4319, 4681, 19127, 32767, 93167, 133889, 652169, 2888177, 20217239]

約数ペア:

[(1, 20217239), (7, 2888177), (31, 652169), (151, 133889), (217, 93167), (617, 32767), (1057, 19127), (4319, 4681)]