20399415

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{31627}}^1$

素因数の和:31678

約数の個数: 16

約数和(自身を含む): 33399168

約数和(自身を除く): 12999753

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 31627, 94881, 158135, 474405, 1359961, 4079883, 6799805, 20399415]

約数ペア:

[(1, 20399415), (3, 6799805), (5, 4079883), (15, 1359961), (43, 474405), (129, 158135), (215, 94881), (645, 31627)]