399338128

素因数分解:

$2^4\times 7^1\times {\mathrm{181}}^1\times {\mathrm{19699}}^1$

素因数の和:19895

約数の個数: 40

約数和(自身を含む): 889179200

約数和(自身を除く): 489841072

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 181, 362, 724, 1267, 1448, 2534, 2896, 5068, 10136, 19699, 20272, 39398, 78796, 137893, 157592, 275786, 315184, 551572, 1103144, 2206288, 3565519, 7131038, 14262076, 24958633, 28524152, 49917266, 57048304, 99834532, 199669064, 399338128]

約数ペア:

[(1, 399338128), (2, 199669064), (4, 99834532), (7, 57048304), (8, 49917266), (14, 28524152), (16, 24958633), (28, 14262076), (56, 7131038), (112, 3565519), (181, 2206288), (362, 1103144), (724, 551572), (1267, 315184), (1448, 275786), (2534, 157592), (2896, 137893), (5068, 78796), (10136, 39398), (19699, 20272)]