21309020

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1657}}^1$

素因数の和:2309

約数の個数: 24

約数和(自身を含む): 44845584

約数和(自身を除く): 23536564

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 1657, 2572, 3215, 3314, 6430, 6628, 8285, 12860, 16570, 33140, 1065451, 2130902, 4261804, 5327255, 10654510, 21309020]

約数ペア:

[(1, 21309020), (2, 10654510), (4, 5327255), (5, 4261804), (10, 2130902), (20, 1065451), (643, 33140), (1286, 16570), (1657, 12860), (2572, 8285), (3215, 6628), (3314, 6430)]