20979553

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{677}}^1$

素因数の和:936

約数の個数: 16

約数和(自身を含む): 25384320

約数和(自身を除く): 4404767

約数列:

[1, 7, 19, 133, 233, 677, 1631, 4427, 4739, 12863, 30989, 90041, 157741, 1104187, 2997079, 20979553]

約数ペア:

[(1, 20979553), (7, 2997079), (19, 1104187), (133, 157741), (233, 90041), (677, 30989), (1631, 12863), (4427, 4739)]