20945721

素因数分解:

$3^1\times {\mathrm{131}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:596

約数の個数: 16

約数和(自身を含む): 28385280

約数和(自身を除く): 7439559

約数列:

[1, 3, 131, 223, 239, 393, 669, 717, 29213, 31309, 53297, 87639, 93927, 159891, 6981907, 20945721]

約数ペア:

[(1, 20945721), (3, 6981907), (131, 159891), (223, 93927), (239, 87639), (393, 53297), (669, 31309), (717, 29213)]