21317981

素因数分解:

${\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{269}}^1$

素因数の和:428

約数の個数: 16

約数和(自身を含む): 23284800

約数和(自身を除く): 1966819

約数列:

[1, 19, 43, 97, 269, 817, 1843, 4171, 5111, 11567, 26093, 79249, 219773, 495767, 1121999, 21317981]

約数ペア:

[(1, 21317981), (19, 1121999), (43, 495767), (97, 219773), (269, 79249), (817, 26093), (1843, 11567), (4171, 5111)]