21556864

素因数分解:

$2^7\times 7^3\times {\mathrm{491}}^1$

素因数の和:526

約数の個数: 64

約数和(自身を含む): 50184000

約数和(自身を除く): 28627136

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 128, 196, 224, 343, 392, 448, 491, 686, 784, 896, 982, 1372, 1568, 1964, 2744, 3136, 3437, 3928, 5488, 6272, 6874, 7856, 10976, 13748, 15712, 21952, 24059, 27496, 31424, 43904, 48118, 54992, 62848, 96236, 109984, 168413, 192472, 219968, 336826, 384944, 439936, 673652, 769888, 1347304, 1539776, 2694608, 3079552, 5389216, 10778432, 21556864]

約数ペア:

[(1, 21556864), (2, 10778432), (4, 5389216), (7, 3079552), (8, 2694608), (14, 1539776), (16, 1347304), (28, 769888), (32, 673652), (49, 439936), (56, 384944), (64, 336826), (98, 219968), (112, 192472), (128, 168413), (196, 109984), (224, 96236), (343, 62848), (392, 54992), (448, 48118), (491, 43904), (686, 31424), (784, 27496), (896, 24059), (982, 21952), (1372, 15712), (1568, 13748), (1964, 10976), (2744, 7856), (3136, 6874), (3437, 6272), (3928, 5488)]