18663316

素因数分解:

$2^2\times 7^3\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 38886400

約数和(自身を除く): 20223084

約数列:

[1, 2, 4, 7, 14, 28, 49, 61, 98, 122, 196, 223, 244, 343, 427, 446, 686, 854, 892, 1372, 1561, 1708, 2989, 3122, 5978, 6244, 10927, 11956, 13603, 20923, 21854, 27206, 41846, 43708, 54412, 76489, 83692, 95221, 152978, 190442, 305956, 380884, 666547, 1333094, 2666188, 4665829, 9331658, 18663316]

約数ペア:

[(1, 18663316), (2, 9331658), (4, 4665829), (7, 2666188), (14, 1333094), (28, 666547), (49, 380884), (61, 305956), (98, 190442), (122, 152978), (196, 95221), (223, 83692), (244, 76489), (343, 54412), (427, 43708), (446, 41846), (686, 27206), (854, 21854), (892, 20923), (1372, 13603), (1561, 11956), (1708, 10927), (2989, 6244), (3122, 5978)]