20457281

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{277}}^1$

素因数の和:345

約数の個数: 24

約数和(自身を含む): 24419520

約数和(自身を除く): 3962239

約数列:

[1, 13, 19, 23, 169, 247, 277, 299, 437, 3211, 3601, 3887, 5263, 5681, 6371, 46813, 68419, 73853, 82823, 121049, 889447, 1076699, 1573637, 20457281]

約数ペア:

[(1, 20457281), (13, 1573637), (19, 1076699), (23, 889447), (169, 121049), (247, 82823), (277, 73853), (299, 68419), (437, 46813), (3211, 6371), (3601, 5681), (3887, 5263)]