256749717

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1\times {\mathrm{1493}}^1$

素因数の和:1953

約数の個数: 32

約数和(自身を含む): 413061120

約数和(自身を除く): 156311403

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 431, 1293, 1493, 3017, 4479, 8189, 9051, 10451, 24567, 28367, 31353, 57323, 85101, 171969, 198569, 595707, 643483, 1930449, 4504381, 12226177, 13513143, 36678531, 85583239, 256749717]

約数ペア:

[(1, 256749717), (3, 85583239), (7, 36678531), (19, 13513143), (21, 12226177), (57, 4504381), (133, 1930449), (399, 643483), (431, 595707), (1293, 198569), (1493, 171969), (3017, 85101), (4479, 57323), (8189, 31353), (9051, 28367), (10451, 24567)]