20721904

素因数分解:

$2^4\times 7^2\times {\mathrm{26431}}^1$

素因数の和:26453

約数の個数: 30

約数和(自身を含む): 46705344

約数和(自身を除く): 25983440

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784, 26431, 52862, 105724, 185017, 211448, 370034, 422896, 740068, 1295119, 1480136, 2590238, 2960272, 5180476, 10360952, 20721904]

約数ペア:

[(1, 20721904), (2, 10360952), (4, 5180476), (7, 2960272), (8, 2590238), (14, 1480136), (16, 1295119), (28, 740068), (49, 422896), (56, 370034), (98, 211448), (112, 185017), (196, 105724), (392, 52862), (784, 26431)]