18991293

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1\times {\mathrm{547}}^1$

素因数の和:784

約数の個数: 16

約数和(自身を含む): 25883136

約数和(自身を除く): 6891843

約数列:

[1, 3, 71, 163, 213, 489, 547, 1641, 11573, 34719, 38837, 89161, 116511, 267483, 6330431, 18991293]

約数ペア:

[(1, 18991293), (3, 6330431), (71, 267483), (163, 116511), (213, 89161), (489, 38837), (547, 34719), (1641, 11573)]