20726321

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 28139520

約数和(自身を除く): 7413199

約数列:

[1, 7, 11, 19, 31, 77, 133, 209, 217, 341, 457, 589, 1463, 2387, 3199, 4123, 5027, 6479, 8683, 14167, 35189, 45353, 60781, 95513, 99169, 155837, 269173, 668591, 1090859, 1884211, 2960903, 20726321]

約数ペア:

[(1, 20726321), (7, 2960903), (11, 1884211), (19, 1090859), (31, 668591), (77, 269173), (133, 155837), (209, 99169), (217, 95513), (341, 60781), (457, 45353), (589, 35189), (1463, 14167), (2387, 8683), (3199, 6479), (4123, 5027)]