256880065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{1259}}^1$

素因数の和:1393

約数の個数: 32

約数和(自身を含む): 344615040

約数和(自身を除く): 87734975

約数列:

[1, 5, 13, 43, 65, 73, 215, 365, 559, 949, 1259, 2795, 3139, 4745, 6295, 15695, 16367, 40807, 54137, 81835, 91907, 204035, 270685, 459535, 703781, 1194791, 3518905, 3952001, 5973955, 19760005, 51376013, 256880065]

約数ペア:

[(1, 256880065), (5, 51376013), (13, 19760005), (43, 5973955), (65, 3952001), (73, 3518905), (215, 1194791), (365, 703781), (559, 459535), (949, 270685), (1259, 204035), (2795, 91907), (3139, 81835), (4745, 54137), (6295, 40807), (15695, 16367)]