20201797

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:130

約数の個数: 48

約数和(自身を含む): 28498176

約数和(自身を除く): 8296379

約数列:

[1, 7, 11, 17, 23, 61, 77, 119, 121, 161, 187, 253, 391, 427, 671, 847, 1037, 1309, 1403, 1771, 2057, 2737, 2783, 4301, 4697, 7259, 7381, 9821, 11407, 14399, 15433, 19481, 23851, 30107, 47311, 51667, 79849, 108031, 125477, 166957, 169763, 262361, 331177, 878339, 1188341, 1836527, 2885971, 20201797]

約数ペア:

[(1, 20201797), (7, 2885971), (11, 1836527), (17, 1188341), (23, 878339), (61, 331177), (77, 262361), (119, 169763), (121, 166957), (161, 125477), (187, 108031), (253, 79849), (391, 51667), (427, 47311), (671, 30107), (847, 23851), (1037, 19481), (1309, 15433), (1403, 14399), (1771, 11407), (2057, 9821), (2737, 7381), (2783, 7259), (4301, 4697)]