20939709

素因数分解:

$3^1\times 7^2\times {\mathrm{181}}^1\times {\mathrm{787}}^1$

素因数の和:985

約数の個数: 24

約数和(自身を含む): 32698848

約数和(自身を除く): 11759139

約数列:

[1, 3, 7, 21, 49, 147, 181, 543, 787, 1267, 2361, 3801, 5509, 8869, 16527, 26607, 38563, 115689, 142447, 427341, 997129, 2991387, 6979903, 20939709]

約数ペア:

[(1, 20939709), (3, 6979903), (7, 2991387), (21, 997129), (49, 427341), (147, 142447), (181, 115689), (543, 38563), (787, 26607), (1267, 16527), (2361, 8869), (3801, 5509)]