20890807

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{809}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 26593920

約数和(自身を除く): 5703113

約数列:

[1, 7, 17, 31, 49, 119, 217, 527, 809, 833, 1519, 3689, 5663, 13753, 25079, 25823, 39641, 96271, 175553, 426343, 673897, 1228871, 2984401, 20890807]

約数ペア:

[(1, 20890807), (7, 2984401), (17, 1228871), (31, 673897), (49, 426343), (119, 175553), (217, 96271), (527, 39641), (809, 25823), (833, 25079), (1519, 13753), (3689, 5663)]