21528913

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{397}}^1$

素因数の和:592

約数の個数: 16

約数和(自身を含む): 25268224

約数和(自身を除く): 3739311

約数列:

[1, 7, 61, 127, 397, 427, 889, 2779, 7747, 24217, 50419, 54229, 169519, 352933, 3075559, 21528913]

約数ペア:

[(1, 21528913), (7, 3075559), (61, 352933), (127, 169519), (397, 54229), (427, 50419), (889, 24217), (2779, 7747)]