19878131

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3581}}^1$

素因数の和:3662

約数の個数: 16

約数和(自身を含む): 24873408

約数和(自身を除く): 4995277

約数列:

[1, 7, 13, 61, 91, 427, 793, 3581, 5551, 25067, 46553, 218441, 325871, 1529087, 2839733, 19878131]

約数ペア:

[(1, 19878131), (7, 2839733), (13, 1529087), (61, 325871), (91, 218441), (427, 46553), (793, 25067), (3581, 5551)]