19901493

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{643}}^1$

素因数の和:849

約数の個数: 24

約数和(自身を含む): 30474080

約数和(自身を除く): 10572587

約数列:

[1, 3, 9, 19, 57, 171, 181, 543, 643, 1629, 1929, 3439, 5787, 10317, 12217, 30951, 36651, 109953, 116383, 349149, 1047447, 2211277, 6633831, 19901493]

約数ペア:

[(1, 19901493), (3, 6633831), (9, 2211277), (19, 1047447), (57, 349149), (171, 116383), (181, 109953), (543, 36651), (643, 30951), (1629, 12217), (1929, 10317), (3439, 5787)]