21586905

素因数分解:

$3^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 39399360

約数和(自身を除く): 17812455

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 109, 135, 163, 243, 327, 405, 489, 545, 815, 981, 1215, 1467, 1635, 2445, 2943, 4401, 4905, 7335, 8829, 13203, 14715, 17767, 22005, 26487, 39609, 44145, 53301, 66015, 88835, 132435, 159903, 198045, 266505, 479709, 799515, 1439127, 2398545, 4317381, 7195635, 21586905]

約数ペア:

[(1, 21586905), (3, 7195635), (5, 4317381), (9, 2398545), (15, 1439127), (27, 799515), (45, 479709), (81, 266505), (109, 198045), (135, 159903), (163, 132435), (243, 88835), (327, 66015), (405, 53301), (489, 44145), (545, 39609), (815, 26487), (981, 22005), (1215, 17767), (1467, 14715), (1635, 13203), (2445, 8829), (2943, 7335), (4401, 4905)]