21007445

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{881}}^1$

素因数の和:1156

約数の個数: 16

約数和(自身を含む): 26671680

約数和(自身を除く): 5664235

約数列:

[1, 5, 19, 95, 251, 881, 1255, 4405, 4769, 16739, 23845, 83695, 221131, 1105655, 4201489, 21007445]

約数ペア:

[(1, 21007445), (5, 4201489), (19, 1105655), (95, 221131), (251, 83695), (881, 23845), (1255, 16739), (4405, 4769)]