12720080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:276

約数の個数: 80

約数和(自身を含む): 32140800

約数和(自身を除く): 19420720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 47, 68, 80, 85, 94, 136, 170, 188, 199, 235, 272, 340, 376, 398, 470, 680, 752, 796, 799, 940, 995, 1360, 1592, 1598, 1880, 1990, 3184, 3196, 3383, 3760, 3980, 3995, 6392, 6766, 7960, 7990, 9353, 12784, 13532, 15920, 15980, 16915, 18706, 27064, 31960, 33830, 37412, 46765, 54128, 63920, 67660, 74824, 93530, 135320, 149648, 159001, 187060, 270640, 318002, 374120, 636004, 748240, 795005, 1272008, 1590010, 2544016, 3180020, 6360040, 12720080]

約数ペア:

[(1, 12720080), (2, 6360040), (4, 3180020), (5, 2544016), (8, 1590010), (10, 1272008), (16, 795005), (17, 748240), (20, 636004), (34, 374120), (40, 318002), (47, 270640), (68, 187060), (80, 159001), (85, 149648), (94, 135320), (136, 93530), (170, 74824), (188, 67660), (199, 63920), (235, 54128), (272, 46765), (340, 37412), (376, 33830), (398, 31960), (470, 27064), (680, 18706), (752, 16915), (796, 15980), (799, 15920), (940, 13532), (995, 12784), (1360, 9353), (1592, 7990), (1598, 7960), (1880, 6766), (1990, 6392), (3184, 3995), (3196, 3980), (3383, 3760)]