20316640

素因数分解:

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

素因数の和:3011

約数の個数: 48

約数和(自身を含む): 49130928

約数和(自身を除く): 28814288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2953, 3440, 5906, 6880, 11812, 14765, 23624, 29530, 47248, 59060, 94496, 118120, 126979, 236240, 253958, 472480, 507916, 634895, 1015832, 1269790, 2031664, 2539580, 4063328, 5079160, 10158320, 20316640]

約数ペア:

[(1, 20316640), (2, 10158320), (4, 5079160), (5, 4063328), (8, 2539580), (10, 2031664), (16, 1269790), (20, 1015832), (32, 634895), (40, 507916), (43, 472480), (80, 253958), (86, 236240), (160, 126979), (172, 118120), (215, 94496), (344, 59060), (430, 47248), (688, 29530), (860, 23624), (1376, 14765), (1720, 11812), (2953, 6880), (3440, 5906)]