21089393

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1217}}^1$

素因数の和:1304

約数の個数: 16

約数和(自身を含む): 24009216

約数和(自身を除く): 2919823

約数列:

[1, 13, 31, 43, 403, 559, 1217, 1333, 15821, 17329, 37727, 52331, 490451, 680303, 1622261, 21089393]

約数ペア:

[(1, 21089393), (13, 1622261), (31, 680303), (43, 490451), (403, 52331), (559, 37727), (1217, 17329), (1333, 15821)]