638449920

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{353}}^1$

素因数の和:537

約数の個数: 216

約数和(自身を含む): 2229337656

約数和(自身を除く): 1590887736

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 157, 160, 180, 192, 240, 256, 288, 314, 320, 353, 360, 384, 471, 480, 576, 628, 640, 706, 720, 768, 785, 942, 960, 1059, 1152, 1256, 1280, 1412, 1413, 1440, 1570, 1765, 1884, 1920, 2118, 2304, 2355, 2512, 2824, 2826, 2880, 3140, 3177, 3530, 3768, 3840, 4236, 4710, 5024, 5295, 5648, 5652, 5760, 6280, 6354, 7060, 7065, 7536, 8472, 9420, 10048, 10590, 11296, 11304, 11520, 12560, 12708, 14120, 14130, 15072, 15885, 16944, 18840, 20096, 21180, 22592, 22608, 25120, 25416, 28240, 28260, 30144, 31770, 33888, 37680, 40192, 42360, 45184, 45216, 50240, 50832, 55421, 56480, 56520, 60288, 63540, 67776, 75360, 84720, 90368, 90432, 100480, 101664, 110842, 112960, 113040, 120576, 127080, 135552, 150720, 166263, 169440, 180864, 200960, 203328, 221684, 225920, 226080, 254160, 271104, 277105, 301440, 332526, 338880, 361728, 406656, 443368, 451840, 452160, 498789, 508320, 554210, 602880, 665052, 677760, 813312, 831315, 886736, 904320, 997578, 1016640, 1108420, 1330104, 1355520, 1662630, 1773472, 1808640, 1995156, 2033280, 2216840, 2493945, 2660208, 3325260, 3546944, 3990312, 4066560, 4433680, 4987890, 5320416, 6650520, 7093888, 7980624, 8867360, 9975780, 10640832, 13301040, 14187776, 15961248, 17734720, 19951560, 21281664, 26602080, 31922496, 35469440, 39903120, 42563328, 53204160, 63844992, 70938880, 79806240, 106408320, 127689984, 159612480, 212816640, 319224960, 638449920]

約数ペア:

[(1, 638449920), (2, 319224960), (3, 212816640), (4, 159612480), (5, 127689984), (6, 106408320), (8, 79806240), (9, 70938880), (10, 63844992), (12, 53204160), (15, 42563328), (16, 39903120), (18, 35469440), (20, 31922496), (24, 26602080), (30, 21281664), (32, 19951560), (36, 17734720), (40, 15961248), (45, 14187776), (48, 13301040), (60, 10640832), (64, 9975780), (72, 8867360), (80, 7980624), (90, 7093888), (96, 6650520), (120, 5320416), (128, 4987890), (144, 4433680), (157, 4066560), (160, 3990312), (180, 3546944), (192, 3325260), (240, 2660208), (256, 2493945), (288, 2216840), (314, 2033280), (320, 1995156), (353, 1808640), (360, 1773472), (384, 1662630), (471, 1355520), (480, 1330104), (576, 1108420), (628, 1016640), (640, 997578), (706, 904320), (720, 886736), (768, 831315), (785, 813312), (942, 677760), (960, 665052), (1059, 602880), (1152, 554210), (1256, 508320), (1280, 498789), (1412, 452160), (1413, 451840), (1440, 443368), (1570, 406656), (1765, 361728), (1884, 338880), (1920, 332526), (2118, 301440), (2304, 277105), (2355, 271104), (2512, 254160), (2824, 226080), (2826, 225920), (2880, 221684), (3140, 203328), (3177, 200960), (3530, 180864), (3768, 169440), (3840, 166263), (4236, 150720), (4710, 135552), (5024, 127080), (5295, 120576), (5648, 113040), (5652, 112960), (5760, 110842), (6280, 101664), (6354, 100480), (7060, 90432), (7065, 90368), (7536, 84720), (8472, 75360), (9420, 67776), (10048, 63540), (10590, 60288), (11296, 56520), (11304, 56480), (11520, 55421), (12560, 50832), (12708, 50240), (14120, 45216), (14130, 45184), (15072, 42360), (15885, 40192), (16944, 37680), (18840, 33888), (20096, 31770), (21180, 30144), (22592, 28260), (22608, 28240), (25120, 25416)]