20171739

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:327

約数の個数: 32

約数和(自身を含む): 31739904

約数和(自身を除く): 11568165

約数列:

[1, 3, 7, 21, 71, 83, 163, 213, 249, 489, 497, 581, 1141, 1491, 1743, 3423, 5893, 11573, 13529, 17679, 34719, 40587, 41251, 81011, 94703, 123753, 243033, 284109, 960559, 2881677, 6723913, 20171739]

約数ペア:

[(1, 20171739), (3, 6723913), (7, 2881677), (21, 960559), (71, 284109), (83, 243033), (163, 123753), (213, 94703), (249, 81011), (489, 41251), (497, 40587), (581, 34719), (1141, 17679), (1491, 13529), (1743, 11573), (3423, 5893)]