21128548

素因数分解:

$2^2\times 7^1\times {\mathrm{617}}^1\times {\mathrm{1223}}^1$

素因数の和:1851

約数の個数: 24

約数和(自身を含む): 42360192

約数和(自身を除く): 21231644

約数列:

[1, 2, 4, 7, 14, 28, 617, 1223, 1234, 2446, 2468, 4319, 4892, 8561, 8638, 17122, 17276, 34244, 754591, 1509182, 3018364, 5282137, 10564274, 21128548]

約数ペア:

[(1, 21128548), (2, 10564274), (4, 5282137), (7, 3018364), (14, 1509182), (28, 754591), (617, 34244), (1223, 17276), (1234, 17122), (2446, 8638), (2468, 8561), (4319, 4892)]