21239043

素因数分解:

$3^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1987}}^1$

素因数の和:2506

約数の個数: 16

約数和(自身を含む): 32444160

約数和(自身を除く): 11205117

約数列:

[1, 3, 7, 21, 509, 1527, 1987, 3563, 5961, 10689, 13909, 41727, 1011383, 3034149, 7079681, 21239043]

約数ペア:

[(1, 21239043), (3, 7079681), (7, 3034149), (21, 1011383), (509, 41727), (1527, 13909), (1987, 10689), (3563, 5961)]