20986989

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{1571}}^1$

素因数の和:1708

約数の個数: 16

約数和(自身を含む): 28849344

約数和(自身を除く): 7862355

約数列:

[1, 3, 61, 73, 183, 219, 1571, 4453, 4713, 13359, 95831, 114683, 287493, 344049, 6995663, 20986989]

約数ペア:

[(1, 20986989), (3, 6995663), (61, 344049), (73, 287493), (183, 114683), (219, 95831), (1571, 13359), (4453, 4713)]