21717136

素因数分解:

$2^4\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1999}}^1$

素因数の和:2111

約数の個数: 40

約数和(自身を含む): 48608000

約数和(自身を除く): 26890864

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 97, 112, 194, 388, 679, 776, 1358, 1552, 1999, 2716, 3998, 5432, 7996, 10864, 13993, 15992, 27986, 31984, 55972, 111944, 193903, 223888, 387806, 775612, 1357321, 1551224, 2714642, 3102448, 5429284, 10858568, 21717136]

約数ペア:

[(1, 21717136), (2, 10858568), (4, 5429284), (7, 3102448), (8, 2714642), (14, 1551224), (16, 1357321), (28, 775612), (56, 387806), (97, 223888), (112, 193903), (194, 111944), (388, 55972), (679, 31984), (776, 27986), (1358, 15992), (1552, 13993), (1999, 10864), (2716, 7996), (3998, 5432)]