20997508

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1361}}^1$

素因数の和:1420

約数の個数: 48

約数和(自身を含む): 45763200

約数和(自身を除く): 24765692

約数列:

[1, 2, 4, 7, 14, 19, 28, 29, 38, 58, 76, 116, 133, 203, 266, 406, 532, 551, 812, 1102, 1361, 2204, 2722, 3857, 5444, 7714, 9527, 15428, 19054, 25859, 38108, 39469, 51718, 78938, 103436, 157876, 181013, 276283, 362026, 552566, 724052, 749911, 1105132, 1499822, 2999644, 5249377, 10498754, 20997508]

約数ペア:

[(1, 20997508), (2, 10498754), (4, 5249377), (7, 2999644), (14, 1499822), (19, 1105132), (28, 749911), (29, 724052), (38, 552566), (58, 362026), (76, 276283), (116, 181013), (133, 157876), (203, 103436), (266, 78938), (406, 51718), (532, 39469), (551, 38108), (812, 25859), (1102, 19054), (1361, 15428), (2204, 9527), (2722, 7714), (3857, 5444)]