19720617

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{21839}}^1$

素因数の和:21892

約数の個数: 16

約数和(自身を含む): 30750720

約数和(自身を除く): 11030103

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 21839, 65517, 152873, 458619, 939077, 2817231, 6573539, 19720617]

約数ペア:

[(1, 19720617), (3, 6573539), (7, 2817231), (21, 939077), (43, 458619), (129, 152873), (301, 65517), (903, 21839)]