20547808

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:299

約数の個数: 48

約数和(自身を含む): 42078960

約数和(自身を除く): 21531152

約数列:

[1, 2, 4, 8, 16, 32, 43, 86, 109, 137, 172, 218, 274, 344, 436, 548, 688, 872, 1096, 1376, 1744, 2192, 3488, 4384, 4687, 5891, 9374, 11782, 14933, 18748, 23564, 29866, 37496, 47128, 59732, 74992, 94256, 119464, 149984, 188512, 238928, 477856, 642119, 1284238, 2568476, 5136952, 10273904, 20547808]

約数ペア:

[(1, 20547808), (2, 10273904), (4, 5136952), (8, 2568476), (16, 1284238), (32, 642119), (43, 477856), (86, 238928), (109, 188512), (137, 149984), (172, 119464), (218, 94256), (274, 74992), (344, 59732), (436, 47128), (548, 37496), (688, 29866), (872, 23564), (1096, 18748), (1376, 14933), (1744, 11782), (2192, 9374), (3488, 5891), (4384, 4687)]