16808020

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1307}}^1$

素因数の和:1959

約数の個数: 24

約数和(自身を含む): 35378784

約数和(自身を除く): 18570764

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1307, 2572, 2614, 3215, 5228, 6430, 6535, 12860, 13070, 26140, 840401, 1680802, 3361604, 4202005, 8404010, 16808020]

約数ペア:

[(1, 16808020), (2, 8404010), (4, 4202005), (5, 3361604), (10, 1680802), (20, 840401), (643, 26140), (1286, 13070), (1307, 12860), (2572, 6535), (2614, 6430), (3215, 5228)]