891121

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:252

約数の個数: 16

約数和(自身を含む): 1133568

約数和(自身を除く): 242447

約数列:

[1, 7, 11, 71, 77, 163, 497, 781, 1141, 1793, 5467, 11573, 12551, 81011, 127303, 891121]

約数ペア:

[(1, 891121), (7, 127303), (11, 81011), (71, 12551), (77, 11573), (163, 5467), (497, 1793), (781, 1141)]