208220985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{661019}}^1$

素因数の和:661037

約数の個数: 24

約数和(自身を含む): 412476480

約数和(自身を除く): 204255495

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 661019, 1983057, 3305095, 4627133, 5949171, 9915285, 13881399, 23135665, 29745855, 41644197, 69406995, 208220985]

約数ペア:

[(1, 208220985), (3, 69406995), (5, 41644197), (7, 29745855), (9, 23135665), (15, 13881399), (21, 9915285), (35, 5949171), (45, 4627133), (63, 3305095), (105, 1983057), (315, 661019)]