20640459

素因数分解:

$3^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1931}}^1$

素因数の和:2450

約数の個数: 16

約数和(自身を含む): 31530240

約数和(自身を除く): 10889781

約数列:

[1, 3, 7, 21, 509, 1527, 1931, 3563, 5793, 10689, 13517, 40551, 982879, 2948637, 6880153, 20640459]

約数ペア:

[(1, 20640459), (3, 6880153), (7, 2948637), (21, 982879), (509, 40551), (1527, 13517), (1931, 10689), (3563, 5793)]