21051230

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5147}}^1$

素因数の和:5563

約数の個数: 16

約数和(自身を含む): 37992240

約数和(自身を除く): 16941010

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 5147, 10294, 25735, 51470, 2105123, 4210246, 10525615, 21051230]

約数ペア:

[(1, 21051230), (2, 10525615), (5, 4210246), (10, 2105123), (409, 51470), (818, 25735), (2045, 10294), (4090, 5147)]