21090748

素因数分解:

$2^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{5419}}^1$

素因数の和:5569

約数の個数: 24

約数和(自身を含む): 42492800

約数和(自身を除く): 21402052

約数列:

[1, 2, 4, 7, 14, 28, 139, 278, 556, 973, 1946, 3892, 5419, 10838, 21676, 37933, 75866, 151732, 753241, 1506482, 3012964, 5272687, 10545374, 21090748]

約数ペア:

[(1, 21090748), (2, 10545374), (4, 5272687), (7, 3012964), (14, 1506482), (28, 753241), (139, 151732), (278, 75866), (556, 37933), (973, 21676), (1946, 10838), (3892, 5419)]