28071771

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{107}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 48045312

約数和(自身を除く): 19973541

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 107, 217, 273, 321, 403, 651, 749, 961, 1209, 1391, 2247, 2821, 2883, 3317, 4173, 6727, 8463, 9737, 9951, 12493, 20181, 23219, 29211, 37479, 43121, 69657, 87451, 102827, 129363, 262353, 301847, 308481, 719789, 905541, 1336751, 2159367, 4010253, 9357257, 28071771]

約数ペア:

[(1, 28071771), (3, 9357257), (7, 4010253), (13, 2159367), (21, 1336751), (31, 905541), (39, 719789), (91, 308481), (93, 301847), (107, 262353), (217, 129363), (273, 102827), (321, 87451), (403, 69657), (651, 43121), (749, 37479), (961, 29211), (1209, 23219), (1391, 20181), (2247, 12493), (2821, 9951), (2883, 9737), (3317, 8463), (4173, 6727)]