1225678720

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1997}}^1$

素因数の和:2160

約数の個数: 128

約数和(自身を含む): 3374861760

約数和(自身を除く): 2149183040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 137, 140, 160, 224, 274, 280, 320, 448, 548, 560, 640, 685, 896, 959, 1096, 1120, 1370, 1918, 1997, 2192, 2240, 2740, 3836, 3994, 4384, 4480, 4795, 5480, 7672, 7988, 8768, 9590, 9985, 10960, 13979, 15344, 15976, 17536, 19180, 19970, 21920, 27958, 30688, 31952, 38360, 39940, 43840, 55916, 61376, 63904, 69895, 76720, 79880, 87680, 111832, 122752, 127808, 139790, 153440, 159760, 223664, 255616, 273589, 279580, 306880, 319520, 447328, 547178, 559160, 613760, 639040, 894656, 1094356, 1118320, 1278080, 1367945, 1789312, 1915123, 2188712, 2236640, 2735890, 3830246, 4377424, 4473280, 5471780, 7660492, 8754848, 8946560, 9575615, 10943560, 15320984, 17509696, 19151230, 21887120, 30641968, 35019392, 38302460, 43774240, 61283936, 76604920, 87548480, 122567872, 153209840, 175096960, 245135744, 306419680, 612839360, 1225678720]

約数ペア:

[(1, 1225678720), (2, 612839360), (4, 306419680), (5, 245135744), (7, 175096960), (8, 153209840), (10, 122567872), (14, 87548480), (16, 76604920), (20, 61283936), (28, 43774240), (32, 38302460), (35, 35019392), (40, 30641968), (56, 21887120), (64, 19151230), (70, 17509696), (80, 15320984), (112, 10943560), (128, 9575615), (137, 8946560), (140, 8754848), (160, 7660492), (224, 5471780), (274, 4473280), (280, 4377424), (320, 3830246), (448, 2735890), (548, 2236640), (560, 2188712), (640, 1915123), (685, 1789312), (896, 1367945), (959, 1278080), (1096, 1118320), (1120, 1094356), (1370, 894656), (1918, 639040), (1997, 613760), (2192, 559160), (2240, 547178), (2740, 447328), (3836, 319520), (3994, 306880), (4384, 279580), (4480, 273589), (4795, 255616), (5480, 223664), (7672, 159760), (7988, 153440), (8768, 139790), (9590, 127808), (9985, 122752), (10960, 111832), (13979, 87680), (15344, 79880), (15976, 76720), (17536, 69895), (19180, 63904), (19970, 61376), (21920, 55916), (27958, 43840), (30688, 39940), (31952, 38360)]