20807919

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2081}}^1$

素因数の和:2199

約数の個数: 24

約数和(自身を含む): 33128784

約数和(自身を除く): 12320865

約数列:

[1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 2081, 3333, 6243, 9999, 18729, 22891, 68673, 206019, 210181, 630543, 1891629, 2311991, 6935973, 20807919]

約数ペア:

[(1, 20807919), (3, 6935973), (9, 2311991), (11, 1891629), (33, 630543), (99, 210181), (101, 206019), (303, 68673), (909, 22891), (1111, 18729), (2081, 9999), (3333, 6243)]