21085730

素因数分解:

$2^1\times 5^1\times {\mathrm{647}}^1\times {\mathrm{3259}}^1$

素因数の和:3913

約数の個数: 16

約数和(自身を含む): 38024640

約数和(自身を除く): 16938910

約数列:

[1, 2, 5, 10, 647, 1294, 3235, 3259, 6470, 6518, 16295, 32590, 2108573, 4217146, 10542865, 21085730]

約数ペア:

[(1, 21085730), (2, 10542865), (5, 4217146), (10, 2108573), (647, 32590), (1294, 16295), (3235, 6518), (3259, 6470)]