78207920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:379

約数の個数: 120

約数和(自身を含む): 215263008

約数和(自身を除く): 137055088

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 71, 80, 98, 112, 140, 142, 196, 245, 280, 281, 284, 355, 392, 490, 497, 560, 562, 568, 710, 784, 980, 994, 1124, 1136, 1405, 1420, 1960, 1967, 1988, 2248, 2485, 2810, 2840, 3479, 3920, 3934, 3976, 4496, 4970, 5620, 5680, 6958, 7868, 7952, 9835, 9940, 11240, 13769, 13916, 15736, 17395, 19670, 19880, 19951, 22480, 27538, 27832, 31472, 34790, 39340, 39760, 39902, 55076, 55664, 68845, 69580, 78680, 79804, 99755, 110152, 137690, 139160, 139657, 157360, 159608, 199510, 220304, 275380, 278320, 279314, 319216, 399020, 550760, 558628, 698285, 798040, 977599, 1101520, 1117256, 1396570, 1596080, 1955198, 2234512, 2793140, 3910396, 4887995, 5586280, 7820792, 9775990, 11172560, 15641584, 19551980, 39103960, 78207920]

約数ペア:

[(1, 78207920), (2, 39103960), (4, 19551980), (5, 15641584), (7, 11172560), (8, 9775990), (10, 7820792), (14, 5586280), (16, 4887995), (20, 3910396), (28, 2793140), (35, 2234512), (40, 1955198), (49, 1596080), (56, 1396570), (70, 1117256), (71, 1101520), (80, 977599), (98, 798040), (112, 698285), (140, 558628), (142, 550760), (196, 399020), (245, 319216), (280, 279314), (281, 278320), (284, 275380), (355, 220304), (392, 199510), (490, 159608), (497, 157360), (560, 139657), (562, 139160), (568, 137690), (710, 110152), (784, 99755), (980, 79804), (994, 78680), (1124, 69580), (1136, 68845), (1405, 55664), (1420, 55076), (1960, 39902), (1967, 39760), (1988, 39340), (2248, 34790), (2485, 31472), (2810, 27832), (2840, 27538), (3479, 22480), (3920, 19951), (3934, 19880), (3976, 19670), (4496, 17395), (4970, 15736), (5620, 13916), (5680, 13769), (6958, 11240), (7868, 9940), (7952, 9835)]