21100009

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{281}}^1\times {\mathrm{631}}^1$

素因数の和:936

約数の個数: 16

約数和(自身を含む): 25664256

約数和(自身を除く): 4564247

約数列:

[1, 7, 17, 119, 281, 631, 1967, 4417, 4777, 10727, 33439, 75089, 177311, 1241177, 3014287, 21100009]

約数ペア:

[(1, 21100009), (7, 3014287), (17, 1241177), (119, 177311), (281, 75089), (631, 33439), (1967, 10727), (4417, 4777)]