21504285

素因数分解:

$3^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1609}}^1$

素因数の和:1640

約数の個数: 48

約数和(自身を含む): 42194880

約数和(自身を除く): 20690595

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 243, 297, 405, 495, 891, 1215, 1485, 1609, 2673, 4455, 4827, 8045, 13365, 14481, 17699, 24135, 43443, 53097, 72405, 88495, 130329, 159291, 217215, 265485, 390987, 477873, 651645, 796455, 1433619, 1954935, 2389365, 4300857, 7168095, 21504285]

約数ペア:

[(1, 21504285), (3, 7168095), (5, 4300857), (9, 2389365), (11, 1954935), (15, 1433619), (27, 796455), (33, 651645), (45, 477873), (55, 390987), (81, 265485), (99, 217215), (135, 159291), (165, 130329), (243, 88495), (297, 72405), (405, 53097), (495, 43443), (891, 24135), (1215, 17699), (1485, 14481), (1609, 13365), (2673, 8045), (4455, 4827)]