20403789

素因数分解:

$3^1\times 7^1\times {\mathrm{809}}^1\times {\mathrm{1201}}^1$

素因数の和:2020

約数の個数: 16

約数和(自身を含む): 31155840

約数和(自身を除く): 10752051

約数列:

[1, 3, 7, 21, 809, 1201, 2427, 3603, 5663, 8407, 16989, 25221, 971609, 2914827, 6801263, 20403789]

約数ペア:

[(1, 20403789), (3, 6801263), (7, 2914827), (21, 971609), (809, 25221), (1201, 16989), (2427, 8407), (3603, 5663)]