20128905

素因数分解:

$3^5\times 5^1\times {\mathrm{16567}}^1$

素因数の和:16587

約数の個数: 24

約数和(自身を含む): 36184512

約数和(自身を除く): 16055607

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 16567, 49701, 82835, 149103, 248505, 447309, 745515, 1341927, 2236545, 4025781, 6709635, 20128905]

約数ペア:

[(1, 20128905), (3, 6709635), (5, 4025781), (9, 2236545), (15, 1341927), (27, 745515), (45, 447309), (81, 248505), (135, 149103), (243, 82835), (405, 49701), (1215, 16567)]