208215

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{661}}^1$

素因数の和:679

約数の個数: 24

約数和(自身を含む): 413088

約数和(自身を除く): 204873

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 661, 1983, 3305, 4627, 5949, 9915, 13881, 23135, 29745, 41643, 69405, 208215]

約数ペア:

[(1, 208215), (3, 69405), (5, 41643), (7, 29745), (9, 23135), (15, 13881), (21, 9915), (35, 5949), (45, 4627), (63, 3305), (105, 1983), (315, 661)]