21157161

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1\times {\mathrm{409}}^1$

素因数の和:856

約数の個数: 16

約数和(自身を含む): 29008320

約数和(自身を除く): 7851159

約数列:

[1, 3, 43, 129, 401, 409, 1203, 1227, 17243, 17587, 51729, 52761, 164009, 492027, 7052387, 21157161]

約数ペア:

[(1, 21157161), (3, 7052387), (43, 492027), (129, 164009), (401, 52761), (409, 51729), (1203, 17587), (1227, 17243)]