19778560

素因数分解:

$2^{10}\times 5^1\times {\mathrm{3863}}^1$

素因数の和:3888

約数の個数: 44

約数和(自身を含む): 47457648

約数和(自身を除く): 27679088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 3863, 5120, 7726, 15452, 19315, 30904, 38630, 61808, 77260, 123616, 154520, 247232, 309040, 494464, 618080, 988928, 1236160, 1977856, 2472320, 3955712, 4944640, 9889280, 19778560]

約数ペア:

[(1, 19778560), (2, 9889280), (4, 4944640), (5, 3955712), (8, 2472320), (10, 1977856), (16, 1236160), (20, 988928), (32, 618080), (40, 494464), (64, 309040), (80, 247232), (128, 154520), (160, 123616), (256, 77260), (320, 61808), (512, 38630), (640, 30904), (1024, 19315), (1280, 15452), (2560, 7726), (3863, 5120)]