21009016

素因数分解:

$2^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2699}}^1$

素因数の和:2851

約数の個数: 32

約数和(自身を含む): 45360000

約数和(自身を除く): 24350984

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 139, 278, 556, 973, 1112, 1946, 2699, 3892, 5398, 7784, 10796, 18893, 21592, 37786, 75572, 151144, 375161, 750322, 1500644, 2626127, 3001288, 5252254, 10504508, 21009016]

約数ペア:

[(1, 21009016), (2, 10504508), (4, 5252254), (7, 3001288), (8, 2626127), (14, 1500644), (28, 750322), (56, 375161), (139, 151144), (278, 75572), (556, 37786), (973, 21592), (1112, 18893), (1946, 10796), (2699, 7784), (3892, 5398)]