278345781

素因数分解:

$3^3\times 7^1\times {\mathrm{113}}^1\times {\mathrm{13033}}^1$

素因数の和:13162

約数の個数: 32

約数和(自身を含む): 475480320

約数和(自身を除く): 197134539

約数列:

[1, 3, 7, 9, 21, 27, 63, 113, 189, 339, 791, 1017, 2373, 3051, 7119, 13033, 21357, 39099, 91231, 117297, 273693, 351891, 821079, 1472729, 2463237, 4418187, 10309103, 13254561, 30927309, 39763683, 92781927, 278345781]

約数ペア:

[(1, 278345781), (3, 92781927), (7, 39763683), (9, 30927309), (21, 13254561), (27, 10309103), (63, 4418187), (113, 2463237), (189, 1472729), (339, 821079), (791, 351891), (1017, 273693), (2373, 117297), (3051, 91231), (7119, 39099), (13033, 21357)]