20840986

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{491}}^1\times {\mathrm{1117}}^1$

素因数の和:1629

約数の個数: 16

約数和(自身を含む): 33003360

約数和(自身を除く): 12162374

約数列:

[1, 2, 19, 38, 491, 982, 1117, 2234, 9329, 18658, 21223, 42446, 548447, 1096894, 10420493, 20840986]

約数ペア:

[(1, 20840986), (2, 10420493), (19, 1096894), (38, 548447), (491, 42446), (982, 21223), (1117, 18658), (2234, 9329)]