18720878

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{77359}}^1$

素因数の和:77383

約数の個数: 12

約数和(自身を含む): 30866640

約数和(自身を除く): 12145762

約数列:

[1, 2, 11, 22, 121, 242, 77359, 154718, 850949, 1701898, 9360439, 18720878]

約数ペア:

[(1, 18720878), (2, 9360439), (11, 1701898), (22, 850949), (121, 154718), (242, 77359)]