19839760

素因数分解:

$2^4\times 5^1\times {\mathrm{247997}}^1$

素因数の和:248010

約数の個数: 20

約数和(自身を含む): 46127628

約数和(自身を除く): 26287868

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247997, 495994, 991988, 1239985, 1983976, 2479970, 3967952, 4959940, 9919880, 19839760]

約数ペア:

[(1, 19839760), (2, 9919880), (4, 4959940), (5, 3967952), (8, 2479970), (10, 1983976), (16, 1239985), (20, 991988), (40, 495994), (80, 247997)]