20287989

素因数分解:

$3^4\times {\mathrm{41}}^2\times {\mathrm{149}}^1$

素因数の和:243

約数の個数: 30

約数和(自身を含む): 31272450

約数和(自身を除く): 10984461

約数列:

[1, 3, 9, 27, 41, 81, 123, 149, 369, 447, 1107, 1341, 1681, 3321, 4023, 5043, 6109, 12069, 15129, 18327, 45387, 54981, 136161, 164943, 250469, 494829, 751407, 2254221, 6762663, 20287989]

約数ペア:

[(1, 20287989), (3, 6762663), (9, 2254221), (27, 751407), (41, 494829), (81, 250469), (123, 164943), (149, 136161), (369, 54981), (447, 45387), (1107, 18327), (1341, 15129), (1681, 12069), (3321, 6109), (4023, 5043)]