81000080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1327}}^1$

素因数の和:1456

約数の個数: 80

約数和(自身を含む): 217367040

約数和(自身を除く): 136366960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 109, 112, 140, 218, 280, 436, 545, 560, 763, 872, 1090, 1327, 1526, 1744, 2180, 2654, 3052, 3815, 4360, 5308, 6104, 6635, 7630, 8720, 9289, 10616, 12208, 13270, 15260, 18578, 21232, 26540, 30520, 37156, 46445, 53080, 61040, 74312, 92890, 106160, 144643, 148624, 185780, 289286, 371560, 578572, 723215, 743120, 1012501, 1157144, 1446430, 2025002, 2314288, 2892860, 4050004, 5062505, 5785720, 8100008, 10125010, 11571440, 16200016, 20250020, 40500040, 81000080]

約数ペア:

[(1, 81000080), (2, 40500040), (4, 20250020), (5, 16200016), (7, 11571440), (8, 10125010), (10, 8100008), (14, 5785720), (16, 5062505), (20, 4050004), (28, 2892860), (35, 2314288), (40, 2025002), (56, 1446430), (70, 1157144), (80, 1012501), (109, 743120), (112, 723215), (140, 578572), (218, 371560), (280, 289286), (436, 185780), (545, 148624), (560, 144643), (763, 106160), (872, 92890), (1090, 74312), (1327, 61040), (1526, 53080), (1744, 46445), (2180, 37156), (2654, 30520), (3052, 26540), (3815, 21232), (4360, 18578), (5308, 15260), (6104, 13270), (6635, 12208), (7630, 10616), (8720, 9289)]