20915818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{12347}}^1$

素因数の和:12378

約数の個数: 24

約数和(自身を含む): 39414816

約数和(自身を除く): 18498998

約数列:

[1, 2, 7, 11, 14, 22, 77, 121, 154, 242, 847, 1694, 12347, 24694, 86429, 135817, 172858, 271634, 950719, 1493987, 1901438, 2987974, 10457909, 20915818]

約数ペア:

[(1, 20915818), (2, 10457909), (7, 2987974), (11, 1901438), (14, 1493987), (22, 950719), (77, 271634), (121, 172858), (154, 135817), (242, 86429), (847, 24694), (1694, 12347)]