20816229

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 35294400

約数和(自身を除く): 14478171

約数列:

[1, 3, 7, 19, 21, 29, 49, 57, 87, 133, 147, 203, 257, 399, 551, 609, 771, 931, 1421, 1653, 1799, 2793, 3857, 4263, 4883, 5397, 7453, 11571, 12593, 14649, 22359, 26999, 34181, 37779, 52171, 80997, 102543, 141607, 156513, 239267, 365197, 424821, 717801, 991249, 1095591, 2973747, 6938743, 20816229]

約数ペア:

[(1, 20816229), (3, 6938743), (7, 2973747), (19, 1095591), (21, 991249), (29, 717801), (49, 424821), (57, 365197), (87, 239267), (133, 156513), (147, 141607), (203, 102543), (257, 80997), (399, 52171), (551, 37779), (609, 34181), (771, 26999), (931, 22359), (1421, 14649), (1653, 12593), (1799, 11571), (2793, 7453), (3857, 5397), (4263, 4883)]