638995311

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{133709}}^1$

素因数の和:133780

約数の個数: 20

約数和(自身を含む): 970734600

約数和(自身を除く): 331739289

約数列:

[1, 3, 9, 27, 59, 81, 177, 531, 1593, 4779, 133709, 401127, 1203381, 3610143, 7888831, 10830429, 23666493, 70999479, 212998437, 638995311]

約数ペア:

[(1, 638995311), (3, 212998437), (9, 70999479), (27, 23666493), (59, 10830429), (81, 7888831), (177, 3610143), (531, 1203381), (1593, 401127), (4779, 133709)]