21815260

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{10007}}^1$

素因数の和:10125

約数の個数: 24

約数和(自身を含む): 46236960

約数和(自身を除く): 24421700

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 10007, 20014, 40028, 50035, 100070, 200140, 1090763, 2181526, 4363052, 5453815, 10907630, 21815260]

約数ペア:

[(1, 21815260), (2, 10907630), (4, 5453815), (5, 4363052), (10, 2181526), (20, 1090763), (109, 200140), (218, 100070), (436, 50035), (545, 40028), (1090, 20014), (2180, 10007)]