19988385

素因数分解:

$3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{5309}}^1$

素因数の和:5568

約数の個数: 16

約数和(自身を含む): 32114880

約数和(自身を除く): 12126495

約数列:

[1, 3, 5, 15, 251, 753, 1255, 3765, 5309, 15927, 26545, 79635, 1332559, 3997677, 6662795, 19988385]

約数ペア:

[(1, 19988385), (3, 6662795), (5, 3997677), (15, 1332559), (251, 79635), (753, 26545), (1255, 15927), (3765, 5309)]