19890995

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{709}}^1$

素因数の和:926

約数の個数: 16

約数和(自身を含む): 24810240

約数和(自身を除く): 4919245

約数列:

[1, 5, 31, 155, 181, 709, 905, 3545, 5611, 21979, 28055, 109895, 128329, 641645, 3978199, 19890995]

約数ペア:

[(1, 19890995), (5, 3978199), (31, 641645), (155, 128329), (181, 109895), (709, 28055), (905, 21979), (3545, 5611)]