21452409

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{337}}^1\times {\mathrm{643}}^1$

素因数の和:997

約数の個数: 24

約数和(自身を含む): 33956832

約数和(自身を除く): 12504423

約数列:

[1, 3, 9, 11, 33, 99, 337, 643, 1011, 1929, 3033, 3707, 5787, 7073, 11121, 21219, 33363, 63657, 216691, 650073, 1950219, 2383601, 7150803, 21452409]

約数ペア:

[(1, 21452409), (3, 7150803), (9, 2383601), (11, 1950219), (33, 650073), (99, 216691), (337, 63657), (643, 33363), (1011, 21219), (1929, 11121), (3033, 7073), (3707, 5787)]