19809812

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{450223}}^1$

素因数の和:450238

約数の個数: 12

約数和(自身を含む): 37818816

約数和(自身を除く): 18009004

約数列:

[1, 2, 4, 11, 22, 44, 450223, 900446, 1800892, 4952453, 9904906, 19809812]

約数ペア:

[(1, 19809812), (2, 9904906), (4, 4952453), (11, 1800892), (22, 900446), (44, 450223)]