21511665

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1453}}^1$

素因数の和:1518

約数の個数: 48

約数和(自身を含む): 43550208

約数和(自身を除く): 22038543

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 47, 63, 105, 141, 235, 315, 329, 423, 705, 987, 1453, 1645, 2115, 2961, 4359, 4935, 7265, 10171, 13077, 14805, 21795, 30513, 50855, 65385, 68291, 91539, 152565, 204873, 341455, 457695, 478037, 614619, 1024365, 1434111, 2390185, 3073095, 4302333, 7170555, 21511665]

約数ペア:

[(1, 21511665), (3, 7170555), (5, 4302333), (7, 3073095), (9, 2390185), (15, 1434111), (21, 1024365), (35, 614619), (45, 478037), (47, 457695), (63, 341455), (105, 204873), (141, 152565), (235, 91539), (315, 68291), (329, 65385), (423, 50855), (705, 30513), (987, 21795), (1453, 14805), (1645, 13077), (2115, 10171), (2961, 7265), (4359, 4935)]