19915920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:357

約数の個数: 120

約数和(自身を含む): 67704000

約数和(自身を除く): 47788080

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 139, 144, 180, 199, 240, 278, 360, 398, 417, 556, 597, 695, 720, 796, 834, 995, 1112, 1194, 1251, 1390, 1592, 1668, 1791, 1990, 2085, 2224, 2388, 2502, 2780, 2985, 3184, 3336, 3582, 3980, 4170, 4776, 5004, 5560, 5970, 6255, 6672, 7164, 7960, 8340, 8955, 9552, 10008, 11120, 11940, 12510, 14328, 15920, 16680, 17910, 20016, 23880, 25020, 27661, 28656, 33360, 35820, 47760, 50040, 55322, 71640, 82983, 100080, 110644, 138305, 143280, 165966, 221288, 248949, 276610, 331932, 414915, 442576, 497898, 553220, 663864, 829830, 995796, 1106440, 1244745, 1327728, 1659660, 1991592, 2212880, 2489490, 3319320, 3983184, 4978980, 6638640, 9957960, 19915920]

約数ペア:

[(1, 19915920), (2, 9957960), (3, 6638640), (4, 4978980), (5, 3983184), (6, 3319320), (8, 2489490), (9, 2212880), (10, 1991592), (12, 1659660), (15, 1327728), (16, 1244745), (18, 1106440), (20, 995796), (24, 829830), (30, 663864), (36, 553220), (40, 497898), (45, 442576), (48, 414915), (60, 331932), (72, 276610), (80, 248949), (90, 221288), (120, 165966), (139, 143280), (144, 138305), (180, 110644), (199, 100080), (240, 82983), (278, 71640), (360, 55322), (398, 50040), (417, 47760), (556, 35820), (597, 33360), (695, 28656), (720, 27661), (796, 25020), (834, 23880), (995, 20016), (1112, 17910), (1194, 16680), (1251, 15920), (1390, 14328), (1592, 12510), (1668, 11940), (1791, 11120), (1990, 10008), (2085, 9552), (2224, 8955), (2388, 8340), (2502, 7960), (2780, 7164), (2985, 6672), (3184, 6255), (3336, 5970), (3582, 5560), (3980, 5004), (4170, 4776)]