20509135

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{307}}^1\times {\mathrm{431}}^1$

素因数の和:774

約数の個数: 16

約数和(自身を含む): 25546752

約数和(自身を除く): 5037617

約数列:

[1, 5, 31, 155, 307, 431, 1535, 2155, 9517, 13361, 47585, 66805, 132317, 661585, 4101827, 20509135]

約数ペア:

[(1, 20509135), (5, 4101827), (31, 661585), (155, 132317), (307, 66805), (431, 47585), (1535, 13361), (2155, 9517)]