21281085

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67559}}^1$

素因数の和:67577

約数の個数: 24

約数和(自身を含む): 42157440

約数和(自身を除く): 20876355

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67559, 202677, 337795, 472913, 608031, 1013385, 1418739, 2364565, 3040155, 4256217, 7093695, 21281085]

約数ペア:

[(1, 21281085), (3, 7093695), (5, 4256217), (7, 3040155), (9, 2364565), (15, 1418739), (21, 1013385), (35, 608031), (45, 472913), (63, 337795), (105, 202677), (315, 67559)]