21027903

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12539}}^1$

素因数の和:12598

約数の個数: 16

約数和(自身を含む): 30898560

約数和(自身を除く): 9870657

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12539, 37617, 163007, 489021, 539177, 1617531, 7009301, 21027903]

約数ペア:

[(1, 21027903), (3, 7009301), (13, 1617531), (39, 539177), (43, 489021), (129, 163007), (559, 37617), (1677, 12539)]