19201021

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{499}}^1$

素因数の和:768

約数の個数: 16

約数和(自身を含む): 23040000

約数和(自身を除く): 3838979

約数列:

[1, 7, 23, 161, 239, 499, 1673, 3493, 5497, 11477, 38479, 80339, 119261, 834827, 2743003, 19201021]

約数ペア:

[(1, 19201021), (7, 2743003), (23, 834827), (161, 119261), (239, 80339), (499, 38479), (1673, 11477), (3493, 5497)]