1280860000

素因数分解:

$2^5\times 5^4\times 7^2\times {\mathrm{1307}}^1$

素因数の和:1351

約数の個数: 180

約数和(自身を含む): 3668378868

約数和(自身を除く): 2387518868

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 160, 175, 196, 200, 224, 245, 250, 280, 350, 392, 400, 490, 500, 560, 625, 700, 784, 800, 875, 980, 1000, 1120, 1225, 1250, 1307, 1400, 1568, 1750, 1960, 2000, 2450, 2500, 2614, 2800, 3500, 3920, 4000, 4375, 4900, 5000, 5228, 5600, 6125, 6535, 7000, 7840, 8750, 9149, 9800, 10000, 10456, 12250, 13070, 14000, 17500, 18298, 19600, 20000, 20912, 24500, 26140, 28000, 30625, 32675, 35000, 36596, 39200, 41824, 45745, 49000, 52280, 61250, 64043, 65350, 70000, 73192, 91490, 98000, 104560, 122500, 128086, 130700, 140000, 146384, 163375, 182980, 196000, 209120, 228725, 245000, 256172, 261400, 292768, 320215, 326750, 365960, 457450, 490000, 512344, 522800, 640430, 653500, 731920, 816875, 914900, 980000, 1024688, 1045600, 1143625, 1280860, 1307000, 1463840, 1601075, 1633750, 1829800, 2049376, 2287250, 2561720, 2614000, 3202150, 3267500, 3659600, 4574500, 5123440, 5228000, 5718125, 6404300, 6535000, 7319200, 8005375, 9149000, 10246880, 11436250, 12808600, 13070000, 16010750, 18298000, 22872500, 25617200, 26140000, 32021500, 36596000, 40026875, 45745000, 51234400, 64043000, 80053750, 91490000, 128086000, 160107500, 182980000, 256172000, 320215000, 640430000, 1280860000]

約数ペア:

[(1, 1280860000), (2, 640430000), (4, 320215000), (5, 256172000), (7, 182980000), (8, 160107500), (10, 128086000), (14, 91490000), (16, 80053750), (20, 64043000), (25, 51234400), (28, 45745000), (32, 40026875), (35, 36596000), (40, 32021500), (49, 26140000), (50, 25617200), (56, 22872500), (70, 18298000), (80, 16010750), (98, 13070000), (100, 12808600), (112, 11436250), (125, 10246880), (140, 9149000), (160, 8005375), (175, 7319200), (196, 6535000), (200, 6404300), (224, 5718125), (245, 5228000), (250, 5123440), (280, 4574500), (350, 3659600), (392, 3267500), (400, 3202150), (490, 2614000), (500, 2561720), (560, 2287250), (625, 2049376), (700, 1829800), (784, 1633750), (800, 1601075), (875, 1463840), (980, 1307000), (1000, 1280860), (1120, 1143625), (1225, 1045600), (1250, 1024688), (1307, 980000), (1400, 914900), (1568, 816875), (1750, 731920), (1960, 653500), (2000, 640430), (2450, 522800), (2500, 512344), (2614, 490000), (2800, 457450), (3500, 365960), (3920, 326750), (4000, 320215), (4375, 292768), (4900, 261400), (5000, 256172), (5228, 245000), (5600, 228725), (6125, 209120), (6535, 196000), (7000, 182980), (7840, 163375), (8750, 146384), (9149, 140000), (9800, 130700), (10000, 128086), (10456, 122500), (12250, 104560), (13070, 98000), (14000, 91490), (17500, 73192), (18298, 70000), (19600, 65350), (20000, 64043), (20912, 61250), (24500, 52280), (26140, 49000), (28000, 45745), (30625, 41824), (32675, 39200), (35000, 36596)]