21663873

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{727}}^1$

素因数の和:794

約数の個数: 48

約数和(自身を含む): 39975936

約数和(自身を除く): 18312063

約数列:

[1, 3, 7, 9, 11, 21, 33, 43, 63, 77, 99, 129, 231, 301, 387, 473, 693, 727, 903, 1419, 2181, 2709, 3311, 4257, 5089, 6543, 7997, 9933, 15267, 23991, 29799, 31261, 45801, 55979, 71973, 93783, 167937, 218827, 281349, 343871, 503811, 656481, 1031613, 1969443, 2407097, 3094839, 7221291, 21663873]

約数ペア:

[(1, 21663873), (3, 7221291), (7, 3094839), (9, 2407097), (11, 1969443), (21, 1031613), (33, 656481), (43, 503811), (63, 343871), (77, 281349), (99, 218827), (129, 167937), (231, 93783), (301, 71973), (387, 55979), (473, 45801), (693, 31261), (727, 29799), (903, 23991), (1419, 15267), (2181, 9933), (2709, 7997), (3311, 6543), (4257, 5089)]