19871579

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1571}}^1$

素因数の和:1730

約数の個数: 16

約数和(自身を含む): 24648960

約数和(自身を除く): 4777381

約数列:

[1, 7, 13, 91, 139, 973, 1571, 1807, 10997, 12649, 20423, 142961, 218369, 1528583, 2838797, 19871579]

約数ペア:

[(1, 19871579), (7, 2838797), (13, 1528583), (91, 218369), (139, 142961), (973, 20423), (1571, 12649), (1807, 10997)]