21031171

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{653}}^1$

素因数の和:810

約数の個数: 16

約数和(自身を含む): 24862464

約数和(自身を除く): 3831293

約数列:

[1, 7, 43, 107, 301, 653, 749, 4571, 4601, 28079, 32207, 69871, 196553, 489097, 3004453, 21031171]

約数ペア:

[(1, 21031171), (7, 3004453), (43, 489097), (107, 196553), (301, 69871), (653, 32207), (749, 28079), (4571, 4601)]