21715551

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{359}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16023969

約数列:

[1, 3, 9, 11, 13, 33, 39, 47, 99, 117, 141, 143, 359, 423, 429, 517, 611, 1077, 1287, 1551, 1833, 3231, 3949, 4653, 4667, 5499, 6721, 11847, 14001, 16873, 20163, 35541, 42003, 50619, 51337, 60489, 151857, 154011, 185603, 219349, 462033, 556809, 658047, 1670427, 1974141, 2412839, 7238517, 21715551]

約数ペア:

[(1, 21715551), (3, 7238517), (9, 2412839), (11, 1974141), (13, 1670427), (33, 658047), (39, 556809), (47, 462033), (99, 219349), (117, 185603), (141, 154011), (143, 151857), (359, 60489), (423, 51337), (429, 50619), (517, 42003), (611, 35541), (1077, 20163), (1287, 16873), (1551, 14001), (1833, 11847), (3231, 6721), (3949, 5499), (4653, 4667)]