21785687

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^2\times {\mathrm{89}}^1$

素因数の和:152

約数の個数: 36

約数和(自身を含む): 29398320

約数和(自身を除く): 7612633

約数列:

[1, 7, 11, 17, 77, 89, 119, 121, 187, 289, 623, 847, 979, 1309, 1513, 2023, 2057, 3179, 6853, 10591, 10769, 14399, 16643, 22253, 25721, 34969, 75383, 116501, 180047, 183073, 244783, 282931, 1281511, 1980517, 3112241, 21785687]

約数ペア:

[(1, 21785687), (7, 3112241), (11, 1980517), (17, 1281511), (77, 282931), (89, 244783), (119, 183073), (121, 180047), (187, 116501), (289, 75383), (623, 34969), (847, 25721), (979, 22253), (1309, 16643), (1513, 14399), (2023, 10769), (2057, 10591), (3179, 6853)]