21440278

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{5237}}^1$

素因数の和:5351

約数の個数: 16

約数和(自身を含む): 33942240

約数和(自身を除く): 12501962

約数列:

[1, 2, 23, 46, 89, 178, 2047, 4094, 5237, 10474, 120451, 240902, 466093, 932186, 10720139, 21440278]

約数ペア:

[(1, 21440278), (2, 10720139), (23, 932186), (46, 466093), (89, 240902), (178, 120451), (2047, 10474), (4094, 5237)]