20816761

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{557}}^1$

素因数の和:864

約数の個数: 16

約数和(自身を含む): 25176960

約数和(自身を除く): 4360199

約数列:

[1, 7, 19, 133, 281, 557, 1967, 3899, 5339, 10583, 37373, 74081, 156517, 1095619, 2973823, 20816761]

約数ペア:

[(1, 20816761), (7, 2973823), (19, 1095619), (133, 156517), (281, 74081), (557, 37373), (1967, 10583), (3899, 5339)]