20457009

素因数分解:

$3^3\times {\mathrm{73}}^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:286

約数の個数: 32

約数和(自身を含む): 31328640

約数和(自身を除く): 10871631

約数列:

[1, 3, 9, 27, 73, 97, 107, 219, 291, 321, 657, 873, 963, 1971, 2619, 2889, 7081, 7811, 10379, 21243, 23433, 31137, 63729, 70299, 93411, 191187, 210897, 280233, 757667, 2273001, 6819003, 20457009]

約数ペア:

[(1, 20457009), (3, 6819003), (9, 2273001), (27, 757667), (73, 280233), (97, 210897), (107, 191187), (219, 93411), (291, 70299), (321, 63729), (657, 31137), (873, 23433), (963, 21243), (1971, 10379), (2619, 7811), (2889, 7081)]