21548891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5507}}^1$

素因数の和:5570

約数の個数: 16

約数和(自身を含む): 27143424

約数和(自身を除く): 5594533

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5507, 38549, 71591, 236801, 501137, 1657607, 3078413, 21548891]

約数ペア:

[(1, 21548891), (7, 3078413), (13, 1657607), (43, 501137), (91, 236801), (301, 71591), (559, 38549), (3913, 5507)]