21194540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25847}}^1$

素因数の和:25897

約数の個数: 24

約数和(自身を含む): 45595872

約数和(自身を除く): 24401332

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25847, 51694, 103388, 129235, 258470, 516940, 1059727, 2119454, 4238908, 5298635, 10597270, 21194540]

約数ペア:

[(1, 21194540), (2, 10597270), (4, 5298635), (5, 4238908), (10, 2119454), (20, 1059727), (41, 516940), (82, 258470), (164, 129235), (205, 103388), (410, 51694), (820, 25847)]