19720640

素因数分解:

$2^6\times 5^1\times {\mathrm{61627}}^1$

素因数の和:61644

約数の個数: 28

約数和(自身を含む): 46960536

約数和(自身を除く): 27239896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 61627, 123254, 246508, 308135, 493016, 616270, 986032, 1232540, 1972064, 2465080, 3944128, 4930160, 9860320, 19720640]

約数ペア:

[(1, 19720640), (2, 9860320), (4, 4930160), (5, 3944128), (8, 2465080), (10, 1972064), (16, 1232540), (20, 986032), (32, 616270), (40, 493016), (64, 308135), (80, 246508), (160, 123254), (320, 61627)]