19953927

素因数分解:

$3^2\times 7^2\times {\mathrm{45247}}^1$

素因数の和:45267

約数の個数: 18

約数和(自身を含む): 33528768

約数和(自身を除く): 13574841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45247, 135741, 316729, 407223, 950187, 2217103, 2850561, 6651309, 19953927]

約数ペア:

[(1, 19953927), (3, 6651309), (7, 2850561), (9, 2217103), (21, 950187), (49, 407223), (63, 316729), (147, 135741), (441, 45247)]