198721845

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{630863}}^1$

素因数の和:630881

約数の個数: 24

約数和(自身を含む): 393659136

約数和(自身を除く): 194937291

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 630863, 1892589, 3154315, 4416041, 5677767, 9462945, 13248123, 22080205, 28388835, 39744369, 66240615, 198721845]

約数ペア:

[(1, 198721845), (3, 66240615), (5, 39744369), (7, 28388835), (9, 22080205), (15, 13248123), (21, 9462945), (35, 5677767), (45, 4416041), (63, 3154315), (105, 1892589), (315, 630863)]