8000720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:197

約数の個数: 120

約数和(自身を含む): 23451624

約数和(自身を除く): 15450904

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 80, 91, 98, 104, 112, 130, 140, 157, 182, 196, 208, 245, 260, 280, 314, 364, 392, 455, 490, 520, 560, 628, 637, 728, 784, 785, 910, 980, 1040, 1099, 1256, 1274, 1456, 1570, 1820, 1960, 2041, 2198, 2512, 2548, 3140, 3185, 3640, 3920, 4082, 4396, 5096, 5495, 6280, 6370, 7280, 7693, 8164, 8792, 10192, 10205, 10990, 12560, 12740, 14287, 15386, 16328, 17584, 20410, 21980, 25480, 28574, 30772, 32656, 38465, 40820, 43960, 50960, 57148, 61544, 71435, 76930, 81640, 87920, 100009, 114296, 123088, 142870, 153860, 163280, 200018, 228592, 285740, 307720, 400036, 500045, 571480, 615440, 800072, 1000090, 1142960, 1600144, 2000180, 4000360, 8000720]

約数ペア:

[(1, 8000720), (2, 4000360), (4, 2000180), (5, 1600144), (7, 1142960), (8, 1000090), (10, 800072), (13, 615440), (14, 571480), (16, 500045), (20, 400036), (26, 307720), (28, 285740), (35, 228592), (40, 200018), (49, 163280), (52, 153860), (56, 142870), (65, 123088), (70, 114296), (80, 100009), (91, 87920), (98, 81640), (104, 76930), (112, 71435), (130, 61544), (140, 57148), (157, 50960), (182, 43960), (196, 40820), (208, 38465), (245, 32656), (260, 30772), (280, 28574), (314, 25480), (364, 21980), (392, 20410), (455, 17584), (490, 16328), (520, 15386), (560, 14287), (628, 12740), (637, 12560), (728, 10990), (784, 10205), (785, 10192), (910, 8792), (980, 8164), (1040, 7693), (1099, 7280), (1256, 6370), (1274, 6280), (1456, 5495), (1570, 5096), (1820, 4396), (1960, 4082), (2041, 3920), (2198, 3640), (2512, 3185), (2548, 3140)]