81000081

素因数分解:

$3^4\times {\mathrm{101}}^1\times {\mathrm{9901}}^1$

素因数の和:10014

約数の個数: 20

約数和(自身を含む): 122210484

約数和(自身を除く): 41210403

約数列:

[1, 3, 9, 27, 81, 101, 303, 909, 2727, 8181, 9901, 29703, 89109, 267327, 801981, 1000001, 3000003, 9000009, 27000027, 81000081]

約数ペア:

[(1, 81000081), (3, 27000027), (9, 9000009), (27, 3000003), (81, 1000001), (101, 801981), (303, 267327), (909, 89109), (2727, 29703), (8181, 9901)]