25771640

素因数分解:

$2^3\times 5^1\times {\mathrm{644291}}^1$

素因数の和:644302

約数の個数: 16

約数和(自身を含む): 57986280

約数和(自身を除く): 32214640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 644291, 1288582, 2577164, 3221455, 5154328, 6442910, 12885820, 25771640]

約数ペア:

[(1, 25771640), (2, 12885820), (4, 6442910), (5, 5154328), (8, 3221455), (10, 2577164), (20, 1288582), (40, 644291)]