20043280

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1259}}^1$

素因数の和:1471

約数の個数: 40

約数和(自身を含む): 46872000

約数和(自身を除く): 26828720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1259, 1592, 1990, 2518, 3184, 3980, 5036, 6295, 7960, 10072, 12590, 15920, 20144, 25180, 50360, 100720, 250541, 501082, 1002164, 1252705, 2004328, 2505410, 4008656, 5010820, 10021640, 20043280]

約数ペア:

[(1, 20043280), (2, 10021640), (4, 5010820), (5, 4008656), (8, 2505410), (10, 2004328), (16, 1252705), (20, 1002164), (40, 501082), (80, 250541), (199, 100720), (398, 50360), (796, 25180), (995, 20144), (1259, 15920), (1592, 12590), (1990, 10072), (2518, 7960), (3184, 6295), (3980, 5036)]