19839920

素因数分解:

$2^4\times 5^1\times {\mathrm{247999}}^1$

素因数の和:248012

約数の個数: 20

約数和(自身を含む): 46128000

約数和(自身を除く): 26288080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247999, 495998, 991996, 1239995, 1983992, 2479990, 3967984, 4959980, 9919960, 19839920]

約数ペア:

[(1, 19839920), (2, 9919960), (4, 4959980), (5, 3967984), (8, 2479990), (10, 1983992), (16, 1239995), (20, 991996), (40, 495998), (80, 247999)]