21721504

素因数分解:

$2^5\times 7^3\times {\mathrm{1979}}^1$

素因数の和:2010

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 28174496

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 98, 112, 196, 224, 343, 392, 686, 784, 1372, 1568, 1979, 2744, 3958, 5488, 7916, 10976, 13853, 15832, 27706, 31664, 55412, 63328, 96971, 110824, 193942, 221648, 387884, 443296, 678797, 775768, 1357594, 1551536, 2715188, 3103072, 5430376, 10860752, 21721504]

約数ペア:

[(1, 21721504), (2, 10860752), (4, 5430376), (7, 3103072), (8, 2715188), (14, 1551536), (16, 1357594), (28, 775768), (32, 678797), (49, 443296), (56, 387884), (98, 221648), (112, 193942), (196, 110824), (224, 96971), (343, 63328), (392, 55412), (686, 31664), (784, 27706), (1372, 15832), (1568, 13853), (1979, 10976), (2744, 7916), (3958, 5488)]