21857087

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1381}}^1$

素因数の和:1431

約数の個数: 24

約数和(自身を含む): 28358640

約数和(自身を除く): 6501553

約数列:

[1, 7, 17, 19, 49, 119, 133, 323, 833, 931, 1381, 2261, 9667, 15827, 23477, 26239, 67669, 164339, 183673, 446063, 1150373, 1285711, 3122441, 21857087]

約数ペア:

[(1, 21857087), (7, 3122441), (17, 1285711), (19, 1150373), (49, 446063), (119, 183673), (133, 164339), (323, 67669), (833, 26239), (931, 23477), (1381, 15827), (2261, 9667)]