21006489

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{541}}^1$

素因数の和:637

約数の個数: 24

約数和(自身を含む): 32832192

約数和(自身を除く): 11825703

約数列:

[1, 3, 7, 21, 43, 129, 301, 541, 903, 1623, 1849, 3787, 5547, 11361, 12943, 23263, 38829, 69789, 162841, 488523, 1000309, 3000927, 7002163, 21006489]

約数ペア:

[(1, 21006489), (3, 7002163), (7, 3000927), (21, 1000309), (43, 488523), (129, 162841), (301, 69789), (541, 38829), (903, 23263), (1623, 12943), (1849, 11361), (3787, 5547)]