20987943

素因数分解:

$3^1\times {\mathrm{107}}^1\times {\mathrm{151}}^1\times {\mathrm{433}}^1$

素因数の和:694

約数の個数: 16

約数和(自身を含む): 28498176

約数和(自身を除く): 7510233

約数列:

[1, 3, 107, 151, 321, 433, 453, 1299, 16157, 46331, 48471, 65383, 138993, 196149, 6995981, 20987943]

約数ペア:

[(1, 20987943), (3, 6995981), (107, 196149), (151, 138993), (321, 65383), (433, 48471), (453, 46331), (1299, 16157)]