19986571

素因数分解:

${\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:402

約数の個数: 16

約数和(自身を含む): 22387968

約数和(自身を除く): 2401397

約数列:

[1, 11, 71, 157, 163, 781, 1727, 1793, 11147, 11573, 25591, 122617, 127303, 281501, 1816961, 19986571]

約数ペア:

[(1, 19986571), (11, 1816961), (71, 281501), (157, 127303), (163, 122617), (781, 25591), (1727, 11573), (1793, 11147)]