16720551

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{353}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 25587120

約数和(自身を除く): 8866569

約数列:

[1, 3, 9, 19, 57, 171, 277, 353, 831, 1059, 2493, 3177, 5263, 6707, 15789, 20121, 47367, 60363, 97781, 293343, 880029, 1857839, 5573517, 16720551]

約数ペア:

[(1, 16720551), (3, 5573517), (9, 1857839), (19, 880029), (57, 293343), (171, 97781), (277, 60363), (353, 47367), (831, 20121), (1059, 15789), (2493, 6707), (3177, 5263)]