19965760

素因数分解:

$2^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1451}}^1$

素因数の和:1511

約数の個数: 56

約数和(自身を含む): 48682656

約数和(自身を除く): 28716896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 160, 172, 215, 320, 344, 430, 688, 860, 1376, 1451, 1720, 2752, 2902, 3440, 5804, 6880, 7255, 11608, 13760, 14510, 23216, 29020, 46432, 58040, 62393, 92864, 116080, 124786, 232160, 249572, 311965, 464320, 499144, 623930, 998288, 1247860, 1996576, 2495720, 3993152, 4991440, 9982880, 19965760]

約数ペア:

[(1, 19965760), (2, 9982880), (4, 4991440), (5, 3993152), (8, 2495720), (10, 1996576), (16, 1247860), (20, 998288), (32, 623930), (40, 499144), (43, 464320), (64, 311965), (80, 249572), (86, 232160), (160, 124786), (172, 116080), (215, 92864), (320, 62393), (344, 58040), (430, 46432), (688, 29020), (860, 23216), (1376, 14510), (1451, 13760), (1720, 11608), (2752, 7255), (2902, 6880), (3440, 5804)]