21421665

素因数分解:

$3^8\times 5^1\times {\mathrm{653}}^1$

素因数の和:682

約数の個数: 36

約数和(自身を含む): 38616084

約数和(自身を除く): 17194419

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 653, 729, 1215, 1959, 2187, 3265, 3645, 5877, 6561, 9795, 10935, 17631, 29385, 32805, 52893, 88155, 158679, 264465, 476037, 793395, 1428111, 2380185, 4284333, 7140555, 21421665]

約数ペア:

[(1, 21421665), (3, 7140555), (5, 4284333), (9, 2380185), (15, 1428111), (27, 793395), (45, 476037), (81, 264465), (135, 158679), (243, 88155), (405, 52893), (653, 32805), (729, 29385), (1215, 17631), (1959, 10935), (2187, 9795), (3265, 6561), (3645, 5877)]