19985781

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{2707}}^1$

素因数の和:2840

約数の個数: 16

約数和(自身を含む): 28076544

約数和(自身を除く): 8090763

約数列:

[1, 3, 23, 69, 107, 321, 2461, 2707, 7383, 8121, 62261, 186783, 289649, 868947, 6661927, 19985781]

約数ペア:

[(1, 19985781), (3, 6661927), (23, 868947), (69, 289649), (107, 186783), (321, 62261), (2461, 8121), (2707, 7383)]