21789405

素因数分解:

$3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 80

約数和(自身を含む): 43838784

約数和(自身を除く): 22049379

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 67, 73, 81, 99, 135, 165, 201, 219, 297, 335, 365, 405, 495, 603, 657, 737, 803, 891, 1005, 1095, 1485, 1809, 1971, 2211, 2409, 3015, 3285, 3685, 4015, 4455, 4891, 5427, 5913, 6633, 7227, 9045, 9855, 11055, 12045, 14673, 19899, 21681, 24455, 27135, 29565, 33165, 36135, 44019, 53801, 59697, 65043, 73365, 99495, 108405, 132057, 161403, 220095, 269005, 298485, 325215, 396171, 484209, 660285, 807015, 1452627, 1980855, 2421045, 4357881, 7263135, 21789405]

約数ペア:

[(1, 21789405), (3, 7263135), (5, 4357881), (9, 2421045), (11, 1980855), (15, 1452627), (27, 807015), (33, 660285), (45, 484209), (55, 396171), (67, 325215), (73, 298485), (81, 269005), (99, 220095), (135, 161403), (165, 132057), (201, 108405), (219, 99495), (297, 73365), (335, 65043), (365, 59697), (405, 53801), (495, 44019), (603, 36135), (657, 33165), (737, 29565), (803, 27135), (891, 24455), (1005, 21681), (1095, 19899), (1485, 14673), (1809, 12045), (1971, 11055), (2211, 9855), (2409, 9045), (3015, 7227), (3285, 6633), (3685, 5913), (4015, 5427), (4455, 4891)]