21939460

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 47811456

約数和(自身を除く): 25871996

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 97, 172, 194, 215, 263, 388, 430, 485, 526, 860, 970, 1052, 1315, 1940, 2630, 4171, 5260, 8342, 11309, 16684, 20855, 22618, 25511, 41710, 45236, 51022, 56545, 83420, 102044, 113090, 127555, 226180, 255110, 510220, 1096973, 2193946, 4387892, 5484865, 10969730, 21939460]

約数ペア:

[(1, 21939460), (2, 10969730), (4, 5484865), (5, 4387892), (10, 2193946), (20, 1096973), (43, 510220), (86, 255110), (97, 226180), (172, 127555), (194, 113090), (215, 102044), (263, 83420), (388, 56545), (430, 51022), (485, 45236), (526, 41710), (860, 25511), (970, 22618), (1052, 20855), (1315, 16684), (1940, 11309), (2630, 8342), (4171, 5260)]