21047540

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{22391}}^1$

素因数の和:22447

約数の個数: 24

約数和(自身を含む): 45142272

約数和(自身を除く): 24094732

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 22391, 44782, 89564, 111955, 223910, 447820, 1052377, 2104754, 4209508, 5261885, 10523770, 21047540]

約数ペア:

[(1, 21047540), (2, 10523770), (4, 5261885), (5, 4209508), (10, 2104754), (20, 1052377), (47, 447820), (94, 223910), (188, 111955), (235, 89564), (470, 44782), (940, 22391)]