21280651

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{433}}^1$

素因数の和:523

約数の個数: 24

約数和(自身を含む): 26717040

約数和(自身を除く): 5436389

約数列:

[1, 7, 17, 49, 59, 119, 413, 433, 833, 1003, 2891, 3031, 7021, 7361, 21217, 25547, 49147, 51527, 178829, 360689, 434299, 1251803, 3040093, 21280651]

約数ペア:

[(1, 21280651), (7, 3040093), (17, 1251803), (49, 434299), (59, 360689), (119, 178829), (413, 51527), (433, 49147), (833, 25547), (1003, 21217), (2891, 7361), (3031, 7021)]