19987341

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{4421}}^1$

素因数の和:4572

約数の個数: 16

約数和(自身を含む): 29291328

約数和(自身を除く): 9303987

約数列:

[1, 3, 11, 33, 137, 411, 1507, 4421, 4521, 13263, 48631, 145893, 605677, 1817031, 6662447, 19987341]

約数ペア:

[(1, 19987341), (3, 6662447), (11, 1817031), (33, 605677), (137, 145893), (411, 48631), (1507, 13263), (4421, 4521)]