81976720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:225

約数の個数: 160

約数和(自身を含む): 235699200

約数和(自身を除く): 153722480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 56, 68, 70, 79, 80, 85, 109, 112, 119, 136, 140, 158, 170, 218, 238, 272, 280, 316, 340, 395, 436, 476, 545, 553, 560, 595, 632, 680, 763, 790, 872, 952, 1090, 1106, 1190, 1264, 1343, 1360, 1526, 1580, 1744, 1853, 1904, 2180, 2212, 2380, 2686, 2765, 3052, 3160, 3706, 3815, 4360, 4424, 4760, 5372, 5530, 6104, 6320, 6715, 7412, 7630, 8611, 8720, 8848, 9265, 9401, 9520, 10744, 11060, 12208, 12971, 13430, 14824, 15260, 17222, 18530, 18802, 21488, 22120, 25942, 26860, 29648, 30520, 34444, 37060, 37604, 43055, 44240, 47005, 51884, 53720, 60277, 61040, 64855, 68888, 74120, 75208, 86110, 94010, 103768, 107440, 120554, 129710, 137776, 146387, 148240, 150416, 172220, 188020, 207536, 241108, 259420, 292774, 301385, 344440, 376040, 482216, 518840, 585548, 602770, 688880, 731935, 752080, 964432, 1024709, 1037680, 1171096, 1205540, 1463870, 2049418, 2342192, 2411080, 2927740, 4098836, 4822160, 5123545, 5855480, 8197672, 10247090, 11710960, 16395344, 20494180, 40988360, 81976720]

約数ペア:

[(1, 81976720), (2, 40988360), (4, 20494180), (5, 16395344), (7, 11710960), (8, 10247090), (10, 8197672), (14, 5855480), (16, 5123545), (17, 4822160), (20, 4098836), (28, 2927740), (34, 2411080), (35, 2342192), (40, 2049418), (56, 1463870), (68, 1205540), (70, 1171096), (79, 1037680), (80, 1024709), (85, 964432), (109, 752080), (112, 731935), (119, 688880), (136, 602770), (140, 585548), (158, 518840), (170, 482216), (218, 376040), (238, 344440), (272, 301385), (280, 292774), (316, 259420), (340, 241108), (395, 207536), (436, 188020), (476, 172220), (545, 150416), (553, 148240), (560, 146387), (595, 137776), (632, 129710), (680, 120554), (763, 107440), (790, 103768), (872, 94010), (952, 86110), (1090, 75208), (1106, 74120), (1190, 68888), (1264, 64855), (1343, 61040), (1360, 60277), (1526, 53720), (1580, 51884), (1744, 47005), (1853, 44240), (1904, 43055), (2180, 37604), (2212, 37060), (2380, 34444), (2686, 30520), (2765, 29648), (3052, 26860), (3160, 25942), (3706, 22120), (3815, 21488), (4360, 18802), (4424, 18530), (4760, 17222), (5372, 15260), (5530, 14824), (6104, 13430), (6320, 12971), (6715, 12208), (7412, 11060), (7630, 10744), (8611, 9520), (8720, 9401), (8848, 9265)]