861820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1051}}^1$

素因数の和:1101

約数の個数: 24

約数和(自身を含む): 1855728

約数和(自身を除く): 993908

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1051, 2102, 4204, 5255, 10510, 21020, 43091, 86182, 172364, 215455, 430910, 861820]

約数ペア:

[(1, 861820), (2, 430910), (4, 215455), (5, 172364), (10, 86182), (20, 43091), (41, 21020), (82, 10510), (164, 5255), (205, 4204), (410, 2102), (820, 1051)]