21381437

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3911}}^1$

素因数の和:4000

約数の個数: 16

約数和(自身を含む): 27039744

約数和(自身を除く): 5658307

約数列:

[1, 7, 11, 71, 77, 497, 781, 3911, 5467, 27377, 43021, 277681, 301147, 1943767, 3054491, 21381437]

約数ペア:

[(1, 21381437), (7, 3054491), (11, 1943767), (71, 301147), (77, 277681), (497, 43021), (781, 27377), (3911, 5467)]