28209321

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{1283}}^1$

素因数の和:1645

約数の個数: 24

約数和(自身を含む): 46737600

約数和(自身を除く): 18528279

約数列:

[1, 3, 7, 9, 21, 63, 349, 1047, 1283, 2443, 3141, 3849, 7329, 8981, 11547, 21987, 26943, 80829, 447767, 1343301, 3134369, 4029903, 9403107, 28209321]

約数ペア:

[(1, 28209321), (3, 9403107), (7, 4029903), (9, 3134369), (21, 1343301), (63, 447767), (349, 80829), (1047, 26943), (1283, 21987), (2443, 11547), (3141, 8981), (3849, 7329)]