21597775

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1109}}^1$

素因数の和:1179

約数の個数: 24

約数和(自身を含む): 28904400

約数和(自身を除く): 7306625

約数列:

[1, 5, 19, 25, 41, 95, 205, 475, 779, 1025, 1109, 3895, 5545, 19475, 21071, 27725, 45469, 105355, 227345, 526775, 863911, 1136725, 4319555, 21597775]

約数ペア:

[(1, 21597775), (5, 4319555), (19, 1136725), (25, 863911), (41, 526775), (95, 227345), (205, 105355), (475, 45469), (779, 27725), (1025, 21071), (1109, 19475), (3895, 5545)]