21970790

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5479}}^1$

素因数の和:5887

約数の個数: 16

約数和(自身を含む): 39653280

約数和(自身を除く): 17682490

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5479, 10958, 27395, 54790, 2197079, 4394158, 10985395, 21970790]

約数ペア:

[(1, 21970790), (2, 10985395), (5, 4394158), (10, 2197079), (401, 54790), (802, 27395), (2005, 10958), (4010, 5479)]