21749995

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1\times {\mathrm{269}}^1$

素因数の和:534

約数の個数: 16

約数和(自身を含む): 26619840

約数和(自身を除く): 4869845

約数列:

[1, 5, 103, 157, 269, 515, 785, 1345, 16171, 27707, 42233, 80855, 138535, 211165, 4349999, 21749995]

約数ペア:

[(1, 21749995), (5, 4349999), (103, 211165), (157, 138535), (269, 80855), (515, 42233), (785, 27707), (1345, 16171)]