780921

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{311}}^1$

素因数の和:354

約数の個数: 20

約数和(自身を含む): 1208064

約数和(自身を除く): 427143

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 311, 837, 933, 2511, 2799, 8397, 9641, 25191, 28923, 86769, 260307, 780921]

約数ペア:

[(1, 780921), (3, 260307), (9, 86769), (27, 28923), (31, 25191), (81, 9641), (93, 8397), (279, 2799), (311, 2511), (837, 933)]