28640080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:476

約数の個数: 80

約数和(自身を含む): 76780800

約数和(自身を除く): 48140720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 199, 257, 280, 398, 514, 560, 796, 995, 1028, 1285, 1393, 1592, 1799, 1990, 2056, 2570, 2786, 3184, 3598, 3980, 4112, 5140, 5572, 6965, 7196, 7960, 8995, 10280, 11144, 13930, 14392, 15920, 17990, 20560, 22288, 27860, 28784, 35980, 51143, 55720, 71960, 102286, 111440, 143920, 204572, 255715, 358001, 409144, 511430, 716002, 818288, 1022860, 1432004, 1790005, 2045720, 2864008, 3580010, 4091440, 5728016, 7160020, 14320040, 28640080]

約数ペア:

[(1, 28640080), (2, 14320040), (4, 7160020), (5, 5728016), (7, 4091440), (8, 3580010), (10, 2864008), (14, 2045720), (16, 1790005), (20, 1432004), (28, 1022860), (35, 818288), (40, 716002), (56, 511430), (70, 409144), (80, 358001), (112, 255715), (140, 204572), (199, 143920), (257, 111440), (280, 102286), (398, 71960), (514, 55720), (560, 51143), (796, 35980), (995, 28784), (1028, 27860), (1285, 22288), (1393, 20560), (1592, 17990), (1799, 15920), (1990, 14392), (2056, 13930), (2570, 11144), (2786, 10280), (3184, 8995), (3598, 7960), (3980, 7196), (4112, 6965), (5140, 5572)]