20665711

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:231

約数の個数: 24

約数和(自身を含む): 24418800

約数和(自身を除く): 3753089

約数列:

[1, 11, 19, 89, 101, 121, 209, 979, 1111, 1691, 1919, 2299, 8989, 10769, 12221, 18601, 21109, 98879, 170791, 204611, 232199, 1087669, 1878701, 20665711]

約数ペア:

[(1, 20665711), (11, 1878701), (19, 1087669), (89, 232199), (101, 204611), (121, 170791), (209, 98879), (979, 21109), (1111, 18601), (1691, 12221), (1919, 10769), (2299, 8989)]