21996385

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{1031}}^1$

素因数の和:1304

約数の個数: 16

約数和(自身を含む): 28086912

約数和(自身を除く): 6090527

約数列:

[1, 5, 17, 85, 251, 1031, 1255, 4267, 5155, 17527, 21335, 87635, 258781, 1293905, 4399277, 21996385]

約数ペア:

[(1, 21996385), (5, 4399277), (17, 1293905), (85, 258781), (251, 87635), (1031, 21335), (1255, 17527), (4267, 5155)]