21440990

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{24091}}^1$

素因数の和:24187

約数の個数: 16

約数和(自身を含む): 39029040

約数和(自身を除く): 17588050

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 24091, 48182, 120455, 240910, 2144099, 4288198, 10720495, 21440990]

約数ペア:

[(1, 21440990), (2, 10720495), (5, 4288198), (10, 2144099), (89, 240910), (178, 120455), (445, 48182), (890, 24091)]