20931771

素因数分解:

$3^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 34933248

約数和(自身を除く): 14001477

約数列:

[1, 3, 7, 21, 23, 41, 49, 69, 123, 147, 151, 161, 287, 453, 483, 861, 943, 1057, 1127, 2009, 2829, 3171, 3381, 3473, 6027, 6191, 6601, 7399, 10419, 18573, 19803, 22197, 24311, 43337, 46207, 72933, 130011, 138621, 142393, 170177, 303359, 427179, 510531, 910077, 996751, 2990253, 6977257, 20931771]

約数ペア:

[(1, 20931771), (3, 6977257), (7, 2990253), (21, 996751), (23, 910077), (41, 510531), (49, 427179), (69, 303359), (123, 170177), (147, 142393), (151, 138621), (161, 130011), (287, 72933), (453, 46207), (483, 43337), (861, 24311), (943, 22197), (1057, 19803), (1127, 18573), (2009, 10419), (2829, 7399), (3171, 6601), (3381, 6191), (3473, 6027)]