21790475

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3037}}^1$

素因数の和:3095

約数の個数: 24

約数和(自身を含む): 31643808

約数和(自身を除く): 9853333

約数列:

[1, 5, 7, 25, 35, 41, 175, 205, 287, 1025, 1435, 3037, 7175, 15185, 21259, 75925, 106295, 124517, 531475, 622585, 871619, 3112925, 4358095, 21790475]

約数ペア:

[(1, 21790475), (5, 4358095), (7, 3112925), (25, 871619), (35, 622585), (41, 531475), (175, 124517), (205, 106295), (287, 75925), (1025, 21259), (1435, 15185), (3037, 7175)]