21856959

素因数分解:

$3^4\times {\mathrm{149}}^1\times {\mathrm{1811}}^1$

素因数の和:1972

約数の個数: 20

約数和(自身を含む): 32887800

約数和(自身を除く): 11030841

約数列:

[1, 3, 9, 27, 81, 149, 447, 1341, 1811, 4023, 5433, 12069, 16299, 48897, 146691, 269839, 809517, 2428551, 7285653, 21856959]

約数ペア:

[(1, 21856959), (3, 7285653), (9, 2428551), (27, 809517), (81, 269839), (149, 146691), (447, 48897), (1341, 16299), (1811, 12069), (4023, 5433)]