21153385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5417}}^1$

素因数の和:5504

約数の個数: 16

約数和(自身を含む): 28086912

約数和(自身を除く): 6933527

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5417, 27085, 59587, 297935, 384607, 1923035, 4230677, 21153385]

約数ペア:

[(1, 21153385), (5, 4230677), (11, 1923035), (55, 384607), (71, 297935), (355, 59587), (781, 27085), (3905, 5417)]