20988928

素因数分解:

$2^{10}\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:322

約数の個数: 44

約数和(自身を含む): 42577600

約数和(自身を除く): 21588672

約数列:

[1, 2, 4, 8, 16, 32, 64, 103, 128, 199, 206, 256, 398, 412, 512, 796, 824, 1024, 1592, 1648, 3184, 3296, 6368, 6592, 12736, 13184, 20497, 25472, 26368, 40994, 50944, 52736, 81988, 101888, 105472, 163976, 203776, 327952, 655904, 1311808, 2623616, 5247232, 10494464, 20988928]

約数ペア:

[(1, 20988928), (2, 10494464), (4, 5247232), (8, 2623616), (16, 1311808), (32, 655904), (64, 327952), (103, 203776), (128, 163976), (199, 105472), (206, 101888), (256, 81988), (398, 52736), (412, 50944), (512, 40994), (796, 26368), (824, 25472), (1024, 20497), (1592, 13184), (1648, 12736), (3184, 6592), (3296, 6368)]