21625513

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1997}}^1$

素因数の和:2041

約数の個数: 24

約数和(自身を含む): 28699272

約数和(自身を除く): 7073759

約数列:

[1, 7, 13, 17, 49, 91, 119, 221, 637, 833, 1547, 1997, 10829, 13979, 25961, 33949, 97853, 181727, 237643, 441337, 1272089, 1663501, 3089359, 21625513]

約数ペア:

[(1, 21625513), (7, 3089359), (13, 1663501), (17, 1272089), (49, 441337), (91, 237643), (119, 181727), (221, 97853), (637, 33949), (833, 25961), (1547, 13979), (1997, 10829)]