251830539

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{43789}}^1$

素因数の和:43872

約数の個数: 20

約数和(自身を含む): 381498480

約数和(自身を除く): 129667941

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 5751, 43789, 131367, 394101, 1182303, 3109019, 3546909, 9327057, 27981171, 83943513, 251830539]

約数ペア:

[(1, 251830539), (3, 83943513), (9, 27981171), (27, 9327057), (71, 3546909), (81, 3109019), (213, 1182303), (639, 394101), (1917, 131367), (5751, 43789)]