21387770

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{49739}}^1$

素因数の和:49789

約数の個数: 16

約数和(自身を含む): 39394080

約数和(自身を除く): 18006310

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 49739, 99478, 248695, 497390, 2138777, 4277554, 10693885, 21387770]

約数ペア:

[(1, 21387770), (2, 10693885), (5, 4277554), (10, 2138777), (43, 497390), (86, 248695), (215, 99478), (430, 49739)]