15980000

素因数分解:

$2^5\times 5^4\times {\mathrm{17}}^1\times {\mathrm{47}}^1$

素因数の和:94

約数の個数: 120

約数和(自身を含む): 42511392

約数和(自身を除く): 26531392

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, 3196, 3400, 3760, 3995, 4000, 4250, 4700, 5000, 5875, 6392, 6800, 7520, 7990, 8500, 9400, 10000, 10625, 11750, 12784, 13600, 15980, 17000, 18800, 19975, 20000, 21250, 23500, 25568, 29375, 31960, 34000, 37600, 39950, 42500, 47000, 58750, 63920, 68000, 79900, 85000, 94000, 99875, 117500, 127840, 159800, 170000, 188000, 199750, 235000, 319600, 340000, 399500, 470000, 499375, 639200, 799000, 940000, 998750, 1598000, 1997500, 3196000, 3995000, 7990000, 15980000]

約数ペア:

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