257456640

素因数分解:

$2^9\times 3^1\times 5^1\times 7^1\times {\mathrm{4789}}^1$

素因数の和:4822

約数の個数: 160

約数和(自身を含む): 940832640

約数和(自身を除く): 683376000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 256, 280, 320, 336, 384, 420, 448, 480, 512, 560, 640, 672, 768, 840, 896, 960, 1120, 1280, 1344, 1536, 1680, 1792, 1920, 2240, 2560, 2688, 3360, 3584, 3840, 4480, 4789, 5376, 6720, 7680, 8960, 9578, 10752, 13440, 14367, 17920, 19156, 23945, 26880, 28734, 33523, 38312, 47890, 53760, 57468, 67046, 71835, 76624, 95780, 100569, 114936, 134092, 143670, 153248, 167615, 191560, 201138, 229872, 268184, 287340, 306496, 335230, 383120, 402276, 459744, 502845, 536368, 574680, 612992, 670460, 766240, 804552, 919488, 1005690, 1072736, 1149360, 1225984, 1340920, 1532480, 1609104, 1838976, 2011380, 2145472, 2298720, 2451968, 2681840, 3064960, 3218208, 3677952, 4022760, 4290944, 4597440, 5363680, 6129920, 6436416, 7355904, 8045520, 8581888, 9194880, 10727360, 12259840, 12872832, 16091040, 17163776, 18389760, 21454720, 25745664, 32182080, 36779520, 42909440, 51491328, 64364160, 85818880, 128728320, 257456640]

約数ペア:

[(1, 257456640), (2, 128728320), (3, 85818880), (4, 64364160), (5, 51491328), (6, 42909440), (7, 36779520), (8, 32182080), (10, 25745664), (12, 21454720), (14, 18389760), (15, 17163776), (16, 16091040), (20, 12872832), (21, 12259840), (24, 10727360), (28, 9194880), (30, 8581888), (32, 8045520), (35, 7355904), (40, 6436416), (42, 6129920), (48, 5363680), (56, 4597440), (60, 4290944), (64, 4022760), (70, 3677952), (80, 3218208), (84, 3064960), (96, 2681840), (105, 2451968), (112, 2298720), (120, 2145472), (128, 2011380), (140, 1838976), (160, 1609104), (168, 1532480), (192, 1340920), (210, 1225984), (224, 1149360), (240, 1072736), (256, 1005690), (280, 919488), (320, 804552), (336, 766240), (384, 670460), (420, 612992), (448, 574680), (480, 536368), (512, 502845), (560, 459744), (640, 402276), (672, 383120), (768, 335230), (840, 306496), (896, 287340), (960, 268184), (1120, 229872), (1280, 201138), (1344, 191560), (1536, 167615), (1680, 153248), (1792, 143670), (1920, 134092), (2240, 114936), (2560, 100569), (2688, 95780), (3360, 76624), (3584, 71835), (3840, 67046), (4480, 57468), (4789, 53760), (5376, 47890), (6720, 38312), (7680, 33523), (8960, 28734), (9578, 26880), (10752, 23945), (13440, 19156), (14367, 17920)]