21287859

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{5879}}^1$

素因数の和:5970

約数の個数: 16

約数和(自身を含む): 30481920

約数和(自身を除く): 9194061

約数列:

[1, 3, 17, 51, 71, 213, 1207, 3621, 5879, 17637, 99943, 299829, 417409, 1252227, 7095953, 21287859]

約数ペア:

[(1, 21287859), (3, 7095953), (17, 1252227), (51, 417409), (71, 299829), (213, 99943), (1207, 17637), (3621, 5879)]