20910771

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:173

約数の個数: 64

約数和(自身を含む): 37847040

約数和(自身を除く): 16936269

約数列:

[1, 3, 7, 9, 21, 27, 31, 43, 63, 83, 93, 129, 189, 217, 249, 279, 301, 387, 581, 651, 747, 837, 903, 1161, 1333, 1743, 1953, 2241, 2573, 2709, 3569, 3999, 5229, 5859, 7719, 8127, 9331, 10707, 11997, 15687, 18011, 23157, 24983, 27993, 32121, 35991, 54033, 69471, 74949, 83979, 96363, 110639, 162099, 224847, 251937, 331917, 486297, 674541, 774473, 995751, 2323419, 2987253, 6970257, 20910771]

約数ペア:

[(1, 20910771), (3, 6970257), (7, 2987253), (9, 2323419), (21, 995751), (27, 774473), (31, 674541), (43, 486297), (63, 331917), (83, 251937), (93, 224847), (129, 162099), (189, 110639), (217, 96363), (249, 83979), (279, 74949), (301, 69471), (387, 54033), (581, 35991), (651, 32121), (747, 27993), (837, 24983), (903, 23157), (1161, 18011), (1333, 15687), (1743, 11997), (1953, 10707), (2241, 9331), (2573, 8127), (2709, 7719), (3569, 5859), (3999, 5229)]