81078190

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{20219}}^1$

素因数の和:20627

約数の個数: 16

約数和(自身を含む): 146311920

約数和(自身を除く): 65233730

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 20219, 40438, 101095, 202190, 8107819, 16215638, 40539095, 81078190]

約数ペア:

[(1, 81078190), (2, 40539095), (5, 16215638), (10, 8107819), (401, 202190), (802, 101095), (2005, 40438), (4010, 20219)]