21391345

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{227}}^1\times {\mathrm{401}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 26396928

約数和(自身を除く): 5005583

約数列:

[1, 5, 47, 227, 235, 401, 1135, 2005, 10669, 18847, 53345, 91027, 94235, 455135, 4278269, 21391345]

約数ペア:

[(1, 21391345), (5, 4278269), (47, 455135), (227, 94235), (235, 91027), (401, 53345), (1135, 18847), (2005, 10669)]