21120827

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7487}}^1$

素因数の和:7538

約数の個数: 16

約数和(自身を含む): 26836992

約数和(自身を除く): 5716165

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7487, 52409, 97331, 232097, 681317, 1624679, 3017261, 21120827]

約数ペア:

[(1, 21120827), (7, 3017261), (13, 1624679), (31, 681317), (91, 232097), (217, 97331), (403, 52409), (2821, 7487)]