21161728

素因数分解:

$2^8\times 7^3\times {\mathrm{241}}^1$

素因数の和:278

約数の個数: 72

約数和(自身を含む): 49464800

約数和(自身を除く): 28303072

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 98, 112, 128, 196, 224, 241, 256, 343, 392, 448, 482, 686, 784, 896, 964, 1372, 1568, 1687, 1792, 1928, 2744, 3136, 3374, 3856, 5488, 6272, 6748, 7712, 10976, 11809, 12544, 13496, 15424, 21952, 23618, 26992, 30848, 43904, 47236, 53984, 61696, 82663, 87808, 94472, 107968, 165326, 188944, 215936, 330652, 377888, 431872, 661304, 755776, 1322608, 1511552, 2645216, 3023104, 5290432, 10580864, 21161728]

約数ペア:

[(1, 21161728), (2, 10580864), (4, 5290432), (7, 3023104), (8, 2645216), (14, 1511552), (16, 1322608), (28, 755776), (32, 661304), (49, 431872), (56, 377888), (64, 330652), (98, 215936), (112, 188944), (128, 165326), (196, 107968), (224, 94472), (241, 87808), (256, 82663), (343, 61696), (392, 53984), (448, 47236), (482, 43904), (686, 30848), (784, 26992), (896, 23618), (964, 21952), (1372, 15424), (1568, 13496), (1687, 12544), (1792, 11809), (1928, 10976), (2744, 7712), (3136, 6748), (3374, 6272), (3856, 5488)]