20485773

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:175

約数の個数: 72

約数和(自身を含む): 38840256

約数和(自身を除く): 18354483

約数列:

[1, 3, 7, 9, 11, 21, 33, 41, 49, 63, 77, 99, 103, 123, 147, 231, 287, 309, 369, 441, 451, 539, 693, 721, 861, 927, 1133, 1353, 1617, 2009, 2163, 2583, 3157, 3399, 4059, 4223, 4851, 5047, 6027, 6489, 7931, 9471, 10197, 12669, 15141, 18081, 22099, 23793, 28413, 29561, 38007, 45423, 46453, 55517, 66297, 71379, 88683, 139359, 166551, 198891, 206927, 266049, 325171, 418077, 499653, 620781, 975513, 1862343, 2276197, 2926539, 6828591, 20485773]

約数ペア:

[(1, 20485773), (3, 6828591), (7, 2926539), (9, 2276197), (11, 1862343), (21, 975513), (33, 620781), (41, 499653), (49, 418077), (63, 325171), (77, 266049), (99, 206927), (103, 198891), (123, 166551), (147, 139359), (231, 88683), (287, 71379), (309, 66297), (369, 55517), (441, 46453), (451, 45423), (539, 38007), (693, 29561), (721, 28413), (861, 23793), (927, 22099), (1133, 18081), (1353, 15141), (1617, 12669), (2009, 10197), (2163, 9471), (2583, 7931), (3157, 6489), (3399, 6027), (4059, 5047), (4223, 4851)]