21912201

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15913}}^1$

素因数の和:15942

約数の個数: 20

約数和(自身を含む): 34660692

約数和(自身を除く): 12748491

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15913, 47739, 143217, 270521, 429651, 811563, 1288953, 2434689, 7304067, 21912201]

約数ペア:

[(1, 21912201), (3, 7304067), (9, 2434689), (17, 1288953), (27, 811563), (51, 429651), (81, 270521), (153, 143217), (459, 47739), (1377, 15913)]