20211757425

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{421}}^1\times {\mathrm{6883}}^1$

素因数の和:7351

約数の個数: 72

約数和(自身を含む): 37463499008

約数和(自身を除く): 17251741583

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 421, 465, 775, 1263, 1395, 2105, 2325, 3789, 6315, 6883, 6975, 10525, 13051, 18945, 20649, 31575, 34415, 39153, 61947, 65255, 94725, 103245, 117459, 172075, 195765, 213373, 309735, 326275, 516225, 587295, 640119, 978825, 1066865, 1548675, 1920357, 2897743, 2936475, 3200595, 5334325, 8693229, 9601785, 14488715, 16002975, 26079687, 43466145, 48008925, 72443575, 89830033, 130398435, 217330725, 269490099, 449150165, 651992175, 808470297, 1347450495, 2245750825, 4042351485, 6737252475, 20211757425]

約数ペア:

[(1, 20211757425), (3, 6737252475), (5, 4042351485), (9, 2245750825), (15, 1347450495), (25, 808470297), (31, 651992175), (45, 449150165), (75, 269490099), (93, 217330725), (155, 130398435), (225, 89830033), (279, 72443575), (421, 48008925), (465, 43466145), (775, 26079687), (1263, 16002975), (1395, 14488715), (2105, 9601785), (2325, 8693229), (3789, 5334325), (6315, 3200595), (6883, 2936475), (6975, 2897743), (10525, 1920357), (13051, 1548675), (18945, 1066865), (20649, 978825), (31575, 640119), (34415, 587295), (39153, 516225), (61947, 326275), (65255, 309735), (94725, 213373), (103245, 195765), (117459, 172075)]