20487915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{337}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 40916928

約数和(自身を除く): 20429013

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 193, 315, 337, 579, 965, 1011, 1351, 1685, 1737, 2359, 2895, 3033, 4053, 5055, 6755, 7077, 8685, 11795, 12159, 15165, 20265, 21231, 35385, 60795, 65041, 106155, 195123, 325205, 455287, 585369, 975615, 1365861, 2276435, 2926845, 4097583, 6829305, 20487915]

約数ペア:

[(1, 20487915), (3, 6829305), (5, 4097583), (7, 2926845), (9, 2276435), (15, 1365861), (21, 975615), (35, 585369), (45, 455287), (63, 325205), (105, 195123), (193, 106155), (315, 65041), (337, 60795), (579, 35385), (965, 21231), (1011, 20265), (1351, 15165), (1685, 12159), (1737, 11795), (2359, 8685), (2895, 7077), (3033, 6755), (4053, 5055)]