79900000

素因数分解:

$2^5\times 5^5\times {\mathrm{17}}^1\times {\mathrm{47}}^1$

素因数の和:99

約数の個数: 144

約数和(自身を含む): 212611392

約数和(自身を除く): 132711392

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 47, 50, 68, 80, 85, 94, 100, 125, 136, 160, 170, 188, 200, 235, 250, 272, 340, 376, 400, 425, 470, 500, 544, 625, 680, 752, 799, 800, 850, 940, 1000, 1175, 1250, 1360, 1504, 1598, 1700, 1880, 2000, 2125, 2350, 2500, 2720, 3125, 3196, 3400, 3760, 3995, 4000, 4250, 4700, 5000, 5875, 6250, 6392, 6800, 7520, 7990, 8500, 9400, 10000, 10625, 11750, 12500, 12784, 13600, 15980, 17000, 18800, 19975, 20000, 21250, 23500, 25000, 25568, 29375, 31960, 34000, 37600, 39950, 42500, 47000, 50000, 53125, 58750, 63920, 68000, 79900, 85000, 94000, 99875, 100000, 106250, 117500, 127840, 146875, 159800, 170000, 188000, 199750, 212500, 235000, 293750, 319600, 340000, 399500, 425000, 470000, 499375, 587500, 639200, 799000, 850000, 940000, 998750, 1175000, 1598000, 1700000, 1997500, 2350000, 2496875, 3196000, 3995000, 4700000, 4993750, 7990000, 9987500, 15980000, 19975000, 39950000, 79900000]

約数ペア:

[(1, 79900000), (2, 39950000), (4, 19975000), (5, 15980000), (8, 9987500), (10, 7990000), (16, 4993750), (17, 4700000), (20, 3995000), (25, 3196000), (32, 2496875), (34, 2350000), (40, 1997500), (47, 1700000), (50, 1598000), (68, 1175000), (80, 998750), (85, 940000), (94, 850000), (100, 799000), (125, 639200), (136, 587500), (160, 499375), (170, 470000), (188, 425000), (200, 399500), (235, 340000), (250, 319600), (272, 293750), (340, 235000), (376, 212500), (400, 199750), (425, 188000), (470, 170000), (500, 159800), (544, 146875), (625, 127840), (680, 117500), (752, 106250), (799, 100000), (800, 99875), (850, 94000), (940, 85000), (1000, 79900), (1175, 68000), (1250, 63920), (1360, 58750), (1504, 53125), (1598, 50000), (1700, 47000), (1880, 42500), (2000, 39950), (2125, 37600), (2350, 34000), (2500, 31960), (2720, 29375), (3125, 25568), (3196, 25000), (3400, 23500), (3760, 21250), (3995, 20000), (4000, 19975), (4250, 18800), (4700, 17000), (5000, 15980), (5875, 13600), (6250, 12784), (6392, 12500), (6800, 11750), (7520, 10625), (7990, 10000), (8500, 9400)]