128440520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247001}}^1$

素因数の和:247025

約数の個数: 32

約数和(自身を含む): 311222520

約数和(自身を除く): 182782000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 247001, 494002, 988004, 1235005, 1976008, 2470010, 3211013, 4940020, 6422026, 9880040, 12844052, 16055065, 25688104, 32110130, 64220260, 128440520]

約数ペア:

[(1, 128440520), (2, 64220260), (4, 32110130), (5, 25688104), (8, 16055065), (10, 12844052), (13, 9880040), (20, 6422026), (26, 4940020), (40, 3211013), (52, 2470010), (65, 1976008), (104, 1235005), (130, 988004), (260, 494002), (520, 247001)]