280781312

素因数分解:

$2^9\times 7^1\times {\mathrm{157}}^1\times {\mathrm{499}}^1$

素因数の和:681

約数の個数: 80

約数和(自身を含む): 646536000

約数和(自身を除く): 365754688

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 157, 224, 256, 314, 448, 499, 512, 628, 896, 998, 1099, 1256, 1792, 1996, 2198, 2512, 3493, 3584, 3992, 4396, 5024, 6986, 7984, 8792, 10048, 13972, 15968, 17584, 20096, 27944, 31936, 35168, 40192, 55888, 63872, 70336, 78343, 80384, 111776, 127744, 140672, 156686, 223552, 255488, 281344, 313372, 447104, 548401, 562688, 626744, 894208, 1096802, 1253488, 1788416, 2193604, 2506976, 4387208, 5013952, 8774416, 10027904, 17548832, 20055808, 35097664, 40111616, 70195328, 140390656, 280781312]

約数ペア:

[(1, 280781312), (2, 140390656), (4, 70195328), (7, 40111616), (8, 35097664), (14, 20055808), (16, 17548832), (28, 10027904), (32, 8774416), (56, 5013952), (64, 4387208), (112, 2506976), (128, 2193604), (157, 1788416), (224, 1253488), (256, 1096802), (314, 894208), (448, 626744), (499, 562688), (512, 548401), (628, 447104), (896, 313372), (998, 281344), (1099, 255488), (1256, 223552), (1792, 156686), (1996, 140672), (2198, 127744), (2512, 111776), (3493, 80384), (3584, 78343), (3992, 70336), (4396, 63872), (5024, 55888), (6986, 40192), (7984, 35168), (8792, 31936), (10048, 27944), (13972, 20096), (15968, 17584)]