21740271

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{2083}}^1$

素因数の和:2171

約数の個数: 24

約数和(自身を含む): 34210944

約数和(自身を除く): 12470673

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 2083, 3479, 6249, 10437, 14581, 43743, 102067, 147893, 306201, 443679, 1035251, 3105753, 7246757, 21740271]

約数ペア:

[(1, 21740271), (3, 7246757), (7, 3105753), (21, 1035251), (49, 443679), (71, 306201), (147, 147893), (213, 102067), (497, 43743), (1491, 14581), (2083, 10437), (3479, 6249)]