20821389

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{1459}}^1$

素因数の和:1600

約数の個数: 16

約数和(自身を含む): 28592640

約数和(自身を除く): 7771251

約数列:

[1, 3, 67, 71, 201, 213, 1459, 4377, 4757, 14271, 97753, 103589, 293259, 310767, 6940463, 20821389]

約数ペア:

[(1, 20821389), (3, 6940463), (67, 310767), (71, 293259), (201, 103589), (213, 97753), (1459, 14271), (4377, 4757)]