28804040

素因数分解:

$2^3\times 5^1\times {\mathrm{720101}}^1$

素因数の和:720112

約数の個数: 16

約数和(自身を含む): 64809180

約数和(自身を除く): 36005140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 720101, 1440202, 2880404, 3600505, 5760808, 7201010, 14402020, 28804040]

約数ペア:

[(1, 28804040), (2, 14402020), (4, 7201010), (5, 5760808), (8, 3600505), (10, 2880404), (20, 1440202), (40, 720101)]