19780285

素因数分解:

$5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{1997}}^1$

素因数の和:2292

約数の個数: 16

約数和(自身を含む): 27236736

約数和(自身を除く): 7456451

約数列:

[1, 5, 7, 35, 283, 1415, 1981, 1997, 9905, 9985, 13979, 69895, 565151, 2825755, 3956057, 19780285]

約数ペア:

[(1, 19780285), (5, 3956057), (7, 2825755), (35, 565151), (283, 69895), (1415, 13979), (1981, 9985), (1997, 9905)]