19216281

素因数分解:

$3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2143}}^1$

素因数の和:2221

約数の個数: 24

約数和(自身を含む): 30307584

約数和(自身を除く): 11091303

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 427, 1281, 2143, 2989, 6429, 8967, 15001, 45003, 105007, 130723, 315021, 392169, 915061, 2745183, 6405427, 19216281]

約数ペア:

[(1, 19216281), (3, 6405427), (7, 2745183), (21, 915061), (49, 392169), (61, 315021), (147, 130723), (183, 105007), (427, 45003), (1281, 15001), (2143, 8967), (2989, 6429)]