129728320

素因数分解:

$2^6\times 5^1\times {\mathrm{405401}}^1$

素因数の和:405418

約数の個数: 28

約数和(自身を含む): 308916324

約数和(自身を除く): 179188004

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 405401, 810802, 1621604, 2027005, 3243208, 4054010, 6486416, 8108020, 12972832, 16216040, 25945664, 32432080, 64864160, 129728320]

約数ペア:

[(1, 129728320), (2, 64864160), (4, 32432080), (5, 25945664), (8, 16216040), (10, 12972832), (16, 8108020), (20, 6486416), (32, 4054010), (40, 3243208), (64, 2027005), (80, 1621604), (160, 810802), (320, 405401)]