20027721

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{3323}}^1$

素因数の和:3381

約数の個数: 24

約数和(自身を含む): 31830624

約数和(自身を除く): 11802903

約数列:

[1, 3, 7, 21, 41, 49, 123, 147, 287, 861, 2009, 3323, 6027, 9969, 23261, 69783, 136243, 162827, 408729, 488481, 953701, 2861103, 6675907, 20027721]

約数ペア:

[(1, 20027721), (3, 6675907), (7, 2861103), (21, 953701), (41, 488481), (49, 408729), (123, 162827), (147, 136243), (287, 69783), (861, 23261), (2009, 9969), (3323, 6027)]