21258653

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1$

素因数の和:197

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 4868707

約数列:

[1, 13, 17, 29, 31, 107, 221, 377, 403, 493, 527, 899, 1391, 1819, 3103, 3317, 6409, 6851, 11687, 15283, 23647, 40339, 43121, 52751, 56389, 96193, 198679, 685763, 733057, 1250509, 1635281, 21258653]

約数ペア:

[(1, 21258653), (13, 1635281), (17, 1250509), (29, 733057), (31, 685763), (107, 198679), (221, 96193), (377, 56389), (403, 52751), (493, 43121), (527, 40339), (899, 23647), (1391, 15283), (1819, 11687), (3103, 6851), (3317, 6409)]