20928635

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6571}}^1$

素因数の和:6603

約数の個数: 24

約数和(自身を含む): 31466736

約数和(自身を除く): 10538101

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6571, 32855, 45997, 85423, 229985, 321979, 427115, 597961, 1609895, 2989805, 4185727, 20928635]

約数ペア:

[(1, 20928635), (5, 4185727), (7, 2989805), (13, 1609895), (35, 597961), (49, 427115), (65, 321979), (91, 229985), (245, 85423), (455, 45997), (637, 32855), (3185, 6571)]