21490805

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1901}}^1$

素因数の和:1949

約数の個数: 32

約数和(自身を含む): 32866560

約数和(自身を除く): 11375755

約数列:

[1, 5, 7, 17, 19, 35, 85, 95, 119, 133, 323, 595, 665, 1615, 1901, 2261, 9505, 11305, 13307, 32317, 36119, 66535, 161585, 180595, 226219, 252833, 614023, 1131095, 1264165, 3070115, 4298161, 21490805]

約数ペア:

[(1, 21490805), (5, 4298161), (7, 3070115), (17, 1264165), (19, 1131095), (35, 614023), (85, 252833), (95, 226219), (119, 180595), (133, 161585), (323, 66535), (595, 36119), (665, 32317), (1615, 13307), (1901, 11305), (2261, 9505)]