20111215

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{1523}}^1$

素因数の和:1686

約数の個数: 16

約数和(自身を含む): 25603200

約数和(自身を除く): 5491985

約数列:

[1, 5, 19, 95, 139, 695, 1523, 2641, 7615, 13205, 28937, 144685, 211697, 1058485, 4022243, 20111215]

約数ペア:

[(1, 20111215), (5, 4022243), (19, 1058485), (95, 211697), (139, 144685), (695, 28937), (1523, 13205), (2641, 7615)]