21204555

素因数分解:

$3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{11131}}^1$

素因数の和:11266

約数の個数: 16

約数和(自身を含む): 34197504

約数和(自身を除く): 12992949

約数列:

[1, 3, 5, 15, 127, 381, 635, 1905, 11131, 33393, 55655, 166965, 1413637, 4240911, 7068185, 21204555]

約数ペア:

[(1, 21204555), (3, 7068185), (5, 4240911), (15, 1413637), (127, 166965), (381, 55655), (635, 33393), (1905, 11131)]