19908681

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{631}}^1\times {\mathrm{809}}^1$

素因数の和:1456

約数の個数: 16

約数和(自身を含む): 28667520

約数和(自身を除く): 8758839

約数列:

[1, 3, 13, 39, 631, 809, 1893, 2427, 8203, 10517, 24609, 31551, 510479, 1531437, 6636227, 19908681]

約数ペア:

[(1, 19908681), (3, 6636227), (13, 1531437), (39, 510479), (631, 31551), (809, 24609), (1893, 10517), (2427, 8203)]