19965489985

素因数分解:

$5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{2386789}}^1$

素因数の和:2387040

約数の個数: 16

約数和(自身を含む): 27495820800

約数和(自身を除く): 7530330815

約数列:

[1, 5, 7, 35, 239, 1195, 1673, 8365, 2386789, 11933945, 16707523, 83537615, 570442571, 2852212855, 3993097997, 19965489985]

約数ペア:

[(1, 19965489985), (5, 3993097997), (7, 2852212855), (35, 570442571), (239, 83537615), (1195, 16707523), (1673, 11933945), (8365, 2386789)]