21408023

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5471}}^1$

素因数の和:5534

約数の個数: 16

約数和(自身を含む): 26966016

約数和(自身を除く): 5557993

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5471, 38297, 71123, 235253, 497861, 1646771, 3058289, 21408023]

約数ペア:

[(1, 21408023), (7, 3058289), (13, 1646771), (43, 497861), (91, 235253), (301, 71123), (559, 38297), (3913, 5471)]