19992721

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{523}}^1$

素因数の和:700

約数の個数: 16

約数和(自身を含む): 23609344

約数和(自身を除く): 3616623

約数列:

[1, 7, 43, 127, 301, 523, 889, 3661, 5461, 22489, 38227, 66421, 157423, 464947, 2856103, 19992721]

約数ペア:

[(1, 19992721), (7, 2856103), (43, 464947), (127, 157423), (301, 66421), (523, 38227), (889, 22489), (3661, 5461)]