28318745

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{571}}^1$

素因数の和:705

約数の個数: 32

約数和(自身を含む): 42282240

約数和(自身を除く): 13963495

約数列:

[1, 5, 7, 13, 35, 65, 91, 109, 455, 545, 571, 763, 1417, 2855, 3815, 3997, 7085, 7423, 9919, 19985, 37115, 49595, 51961, 62239, 259805, 311195, 435673, 809107, 2178365, 4045535, 5663749, 28318745]

約数ペア:

[(1, 28318745), (5, 5663749), (7, 4045535), (13, 2178365), (35, 809107), (65, 435673), (91, 311195), (109, 259805), (455, 62239), (545, 51961), (571, 49595), (763, 37115), (1417, 19985), (2855, 9919), (3815, 7423), (3997, 7085)]