21081345

素因数分解:

$3^1\times 5^1\times {\mathrm{349}}^1\times {\mathrm{4027}}^1$

素因数の和:4384

約数の個数: 16

約数和(自身を含む): 33835200

約数和(自身を除く): 12753855

約数列:

[1, 3, 5, 15, 349, 1047, 1745, 4027, 5235, 12081, 20135, 60405, 1405423, 4216269, 7027115, 21081345]

約数ペア:

[(1, 21081345), (3, 7027115), (5, 4216269), (15, 1405423), (349, 60405), (1047, 20135), (1745, 12081), (4027, 5235)]