20708289

素因数分解:

$3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1279}}^1$

素因数の和:1549

約数の個数: 24

約数和(自身を含む): 34344960

約数和(自身を除く): 13636671

約数列:

[1, 3, 7, 9, 21, 63, 257, 771, 1279, 1799, 2313, 3837, 5397, 8953, 11511, 16191, 26859, 80577, 328703, 986109, 2300921, 2958327, 6902763, 20708289]

約数ペア:

[(1, 20708289), (3, 6902763), (7, 2958327), (9, 2300921), (21, 986109), (63, 328703), (257, 80577), (771, 26859), (1279, 16191), (1799, 11511), (2313, 8953), (3837, 5397)]