19721819

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{383}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 22643712

約数和(自身を除く): 2921893

約数列:

[1, 13, 17, 221, 233, 383, 3029, 3961, 4979, 6511, 51493, 84643, 89239, 1160107, 1517063, 19721819]

約数ペア:

[(1, 19721819), (13, 1517063), (17, 1160107), (221, 89239), (233, 84643), (383, 51493), (3029, 6511), (3961, 4979)]