20728379

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{233}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 24261120

約数和(自身を除く): 3532741

約数列:

[1, 7, 71, 179, 233, 497, 1253, 1631, 12709, 16543, 41707, 88963, 115801, 291949, 2961197, 20728379]

約数ペア:

[(1, 20728379), (7, 2961197), (71, 291949), (179, 115801), (233, 88963), (497, 41707), (1253, 16543), (1631, 12709)]