20428839

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{293}}^1$

素因数の和:487

約数の個数: 24

約数和(自身を含む): 30331392

約数和(自身を除く): 9902553

約数列:

[1, 3, 9, 61, 127, 183, 293, 381, 549, 879, 1143, 2637, 7747, 17873, 23241, 37211, 53619, 69723, 111633, 160857, 334899, 2269871, 6809613, 20428839]

約数ペア:

[(1, 20428839), (3, 6809613), (9, 2269871), (61, 334899), (127, 160857), (183, 111633), (293, 69723), (381, 53619), (549, 37211), (879, 23241), (1143, 17873), (2637, 7747)]