20321440

素因数分解:

$2^5\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1187}}^1$

素因数の和:1309

約数の個数: 48

約数和(自身を含む): 48498912

約数和(自身を除く): 28177472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 107, 160, 214, 428, 535, 856, 1070, 1187, 1712, 2140, 2374, 3424, 4280, 4748, 5935, 8560, 9496, 11870, 17120, 18992, 23740, 37984, 47480, 94960, 127009, 189920, 254018, 508036, 635045, 1016072, 1270090, 2032144, 2540180, 4064288, 5080360, 10160720, 20321440]

約数ペア:

[(1, 20321440), (2, 10160720), (4, 5080360), (5, 4064288), (8, 2540180), (10, 2032144), (16, 1270090), (20, 1016072), (32, 635045), (40, 508036), (80, 254018), (107, 189920), (160, 127009), (214, 94960), (428, 47480), (535, 37984), (856, 23740), (1070, 18992), (1187, 17120), (1712, 11870), (2140, 9496), (2374, 8560), (3424, 5935), (4280, 4748)]