21715172

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{661}}^1$

素因数の和:899

約数の個数: 24

約数和(自身を含む): 39148032

約数和(自身を除く): 17432860

約数列:

[1, 2, 4, 43, 86, 172, 191, 382, 661, 764, 1322, 2644, 8213, 16426, 28423, 32852, 56846, 113692, 126251, 252502, 505004, 5428793, 10857586, 21715172]

約数ペア:

[(1, 21715172), (2, 10857586), (4, 5428793), (43, 505004), (86, 252502), (172, 126251), (191, 113692), (382, 56846), (661, 32852), (764, 28423), (1322, 16426), (2644, 8213)]