21405104

素因数分解:

$2^4\times 7^1\times {\mathrm{383}}^1\times {\mathrm{499}}^1$

素因数の和:897

約数の個数: 40

約数和(自身を含む): 47616000

約数和(自身を除く): 26210896

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 383, 499, 766, 998, 1532, 1996, 2681, 3064, 3493, 3992, 5362, 6128, 6986, 7984, 10724, 13972, 21448, 27944, 42896, 55888, 191117, 382234, 764468, 1337819, 1528936, 2675638, 3057872, 5351276, 10702552, 21405104]

約数ペア:

[(1, 21405104), (2, 10702552), (4, 5351276), (7, 3057872), (8, 2675638), (14, 1528936), (16, 1337819), (28, 764468), (56, 382234), (112, 191117), (383, 55888), (499, 42896), (766, 27944), (998, 21448), (1532, 13972), (1996, 10724), (2681, 7984), (3064, 6986), (3493, 6128), (3992, 5362)]