21128523

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{293}}^1$

素因数の和:395

約数の個数: 24

約数和(自身を含む): 31166352

約数和(自身を除く): 10037829

約数列:

[1, 3, 13, 39, 43, 129, 293, 559, 879, 1677, 1849, 3809, 5547, 11427, 12599, 24037, 37797, 72111, 163787, 491361, 541757, 1625271, 7042841, 21128523]

約数ペア:

[(1, 21128523), (3, 7042841), (13, 1625271), (39, 541757), (43, 491361), (129, 163787), (293, 72111), (559, 37797), (879, 24037), (1677, 12599), (1849, 11427), (3809, 5547)]