21820721

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{167}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 26013120

約数和(自身を除く): 4192399

約数列:

[1, 13, 19, 23, 167, 247, 299, 437, 529, 2171, 3173, 3841, 5681, 6877, 10051, 41249, 49933, 72979, 88343, 130663, 948727, 1148459, 1678517, 21820721]

約数ペア:

[(1, 21820721), (13, 1678517), (19, 1148459), (23, 948727), (167, 130663), (247, 88343), (299, 72979), (437, 49933), (529, 41249), (2171, 10051), (3173, 6877), (3841, 5681)]