81266560

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2953}}^1$

素因数の和:3015

約数の個数: 64

約数和(自身を含む): 198863280

約数和(自身を除く): 117596720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 688, 860, 1376, 1720, 2752, 2953, 3440, 5504, 5906, 6880, 11812, 13760, 14765, 23624, 27520, 29530, 47248, 59060, 94496, 118120, 126979, 188992, 236240, 253958, 377984, 472480, 507916, 634895, 944960, 1015832, 1269790, 1889920, 2031664, 2539580, 4063328, 5079160, 8126656, 10158320, 16253312, 20316640, 40633280, 81266560]

約数ペア:

[(1, 81266560), (2, 40633280), (4, 20316640), (5, 16253312), (8, 10158320), (10, 8126656), (16, 5079160), (20, 4063328), (32, 2539580), (40, 2031664), (43, 1889920), (64, 1269790), (80, 1015832), (86, 944960), (128, 634895), (160, 507916), (172, 472480), (215, 377984), (320, 253958), (344, 236240), (430, 188992), (640, 126979), (688, 118120), (860, 94496), (1376, 59060), (1720, 47248), (2752, 29530), (2953, 27520), (3440, 23624), (5504, 14765), (5906, 13760), (6880, 11812)]