20728393

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1\times {\mathrm{229}}^1$

素因数の和:496

約数の個数: 16

約数和(自身を含む): 24273280

約数和(自身を除く): 3544887

約数列:

[1, 7, 67, 193, 229, 469, 1351, 1603, 12931, 15343, 44197, 90517, 107401, 309379, 2961199, 20728393]

約数ペア:

[(1, 20728393), (7, 2961199), (67, 309379), (193, 107401), (229, 90517), (469, 44197), (1351, 15343), (1603, 12931)]