20338448

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{353}}^1$

素因数の和:651

約数の個数: 40

約数和(自身を含む): 42710808

約数和(自身を除く): 22372360

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 277, 353, 554, 706, 1108, 1412, 2216, 2824, 3601, 4432, 4589, 5648, 7202, 9178, 14404, 18356, 28808, 36712, 57616, 73424, 97781, 195562, 391124, 782248, 1271153, 1564496, 2542306, 5084612, 10169224, 20338448]

約数ペア:

[(1, 20338448), (2, 10169224), (4, 5084612), (8, 2542306), (13, 1564496), (16, 1271153), (26, 782248), (52, 391124), (104, 195562), (208, 97781), (277, 73424), (353, 57616), (554, 36712), (706, 28808), (1108, 18356), (1412, 14404), (2216, 9178), (2824, 7202), (3601, 5648), (4432, 4589)]