20204721

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 32969664

約数和(自身を除く): 12764943

約数列:

[1, 3, 9, 17, 27, 51, 67, 73, 81, 153, 201, 219, 243, 459, 603, 657, 1139, 1241, 1377, 1809, 1971, 3417, 3723, 4131, 4891, 5427, 5913, 10251, 11169, 14673, 16281, 17739, 30753, 33507, 44019, 83147, 92259, 100521, 132057, 249441, 276777, 301563, 396171, 748323, 1188513, 2244969, 6734907, 20204721]

約数ペア:

[(1, 20204721), (3, 6734907), (9, 2244969), (17, 1188513), (27, 748323), (51, 396171), (67, 301563), (73, 276777), (81, 249441), (153, 132057), (201, 100521), (219, 92259), (243, 83147), (459, 44019), (603, 33507), (657, 30753), (1139, 17739), (1241, 16281), (1377, 14673), (1809, 11169), (1971, 10251), (3417, 5913), (3723, 5427), (4131, 4891)]