19975000

素因数分解:

$2^3\times 5^5\times {\mathrm{17}}^1\times {\mathrm{47}}^1$

素因数の和:95

約数の個数: 96

約数和(自身を含む): 50621760

約数和(自身を除く): 30646760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 47, 50, 68, 85, 94, 100, 125, 136, 170, 188, 200, 235, 250, 340, 376, 425, 470, 500, 625, 680, 799, 850, 940, 1000, 1175, 1250, 1598, 1700, 1880, 2125, 2350, 2500, 3125, 3196, 3400, 3995, 4250, 4700, 5000, 5875, 6250, 6392, 7990, 8500, 9400, 10625, 11750, 12500, 15980, 17000, 19975, 21250, 23500, 25000, 29375, 31960, 39950, 42500, 47000, 53125, 58750, 79900, 85000, 99875, 106250, 117500, 146875, 159800, 199750, 212500, 235000, 293750, 399500, 425000, 499375, 587500, 799000, 998750, 1175000, 1997500, 2496875, 3995000, 4993750, 9987500, 19975000]

約数ペア:

[(1, 19975000), (2, 9987500), (4, 4993750), (5, 3995000), (8, 2496875), (10, 1997500), (17, 1175000), (20, 998750), (25, 799000), (34, 587500), (40, 499375), (47, 425000), (50, 399500), (68, 293750), (85, 235000), (94, 212500), (100, 199750), (125, 159800), (136, 146875), (170, 117500), (188, 106250), (200, 99875), (235, 85000), (250, 79900), (340, 58750), (376, 53125), (425, 47000), (470, 42500), (500, 39950), (625, 31960), (680, 29375), (799, 25000), (850, 23500), (940, 21250), (1000, 19975), (1175, 17000), (1250, 15980), (1598, 12500), (1700, 11750), (1880, 10625), (2125, 9400), (2350, 8500), (2500, 7990), (3125, 6392), (3196, 6250), (3400, 5875), (3995, 5000), (4250, 4700)]