21990177

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:211

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 14781663

約数列:

[1, 3, 9, 11, 27, 33, 53, 99, 121, 127, 159, 297, 363, 381, 477, 583, 1089, 1143, 1397, 1431, 1749, 3267, 3429, 4191, 5247, 6413, 6731, 12573, 15367, 15741, 19239, 20193, 37719, 46101, 57717, 60579, 74041, 138303, 173151, 181737, 222123, 414909, 666369, 814451, 1999107, 2443353, 7330059, 21990177]

約数ペア:

[(1, 21990177), (3, 7330059), (9, 2443353), (11, 1999107), (27, 814451), (33, 666369), (53, 414909), (99, 222123), (121, 181737), (127, 173151), (159, 138303), (297, 74041), (363, 60579), (381, 57717), (477, 46101), (583, 37719), (1089, 20193), (1143, 19239), (1397, 15741), (1431, 15367), (1749, 12573), (3267, 6731), (3429, 6413), (4191, 5247)]