21112861

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{127}}^2$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 28092096

約数和(自身を除く): 6979235

約数列:

[1, 7, 11, 17, 77, 119, 127, 187, 889, 1309, 1397, 2159, 9779, 15113, 16129, 23749, 112903, 166243, 177419, 274193, 1241933, 1919351, 3016123, 21112861]

約数ペア:

[(1, 21112861), (7, 3016123), (11, 1919351), (17, 1241933), (77, 274193), (119, 177419), (127, 166243), (187, 112903), (889, 23749), (1309, 16129), (1397, 15113), (2159, 9779)]